What is the best exterior paint for metal? Paint for rust: Comparison and selection of the best options

This article discusses this type finishing material, as metal paint for exterior use: the main types of compositions used in suburban construction, their pros and cons, technical and operational characteristics. In the text you can find information that will help you choose the best dye, as well as prices for popular products.

Painting metal products is a necessary measure to extend the service life of the material, as well as preserve its attractive appearance and novelty for a long time. This process is accompanied by some difficulties, and the difficulties affect not the technology of applying the composition itself, but its choice. The dye must have necessary set performance characteristics, exhibit resistance to negative impact external factors and maintain their properties over a long period of time.

Used for processing metal surfaces the following types dyes:

• nitro (NC, aerosol);
• pentaphthalic (PF);
• rubber;
• hammer;
• polymeric.

Each type of dye has certain advantages and disadvantages, and the inherent performance characteristics of the composition make it possible to accurately determine under what conditions positive traits coatings will bring maximum benefit.

Properties of aerosol paint in cans for metal

Nitro composition for painting metal surfaces is produced by manufacturers in the form of aerosol cans. This type of dye is ideal for finishing products small size. Due to the fact that the composition is applied to surfaces by spraying, the likelihood of streaks that usually accompany the use of a roller or brush as a tool is eliminated.

To thin the paint, you can use chemical solvents of any brand. To achieve a strong shine, you need to buy metal paint for exterior use with a large number in the name. The higher the number, the more shine. Any tool can be used for application, including pneumatic and a regular brush. The only exception is rollers with foam coats. This type of material corrodes upon contact with CNC.

Interesting fact! Nitro dye is used as a refill for markers for drawing.

This type of dye is not suitable for processing large products. This is not only costly, but also comes with more disadvantages than advantages.

Advantages and disadvantages of paints in metal cans

Let's consider the disadvantages of nitro dyes intended for finishing metal products:

• low level of adhesion, which negatively affects the service life of the coating;
• toxic and unpleasant odor harmful to human health;
• low resistance to ultraviolet radiation;

• rapid fading of the shade in the sun;
• high consumption of metal paint per m2 of treated area;
• incompatibility with other types of dyes.

Due to the fact that the dyes in the cans contain chemical solvents, any type of coating of another type is corroded when NC is applied. In addition, the presence of such components becomes a source of toxic and pungent odors harmful to human health. Therefore, nitro dyes can only be used outdoors.

Advantages of nitro dyes:

• relatively low cost (significant savings can be achieved if you buy metal paint not in a can, but in a can);
• simple application technology regardless of method;
• the coating dries quickly;
• coloring can be carried out even at low temperatures;
• wash old paint removal from metal can be done using a regular solvent.

Properties, advantages and disadvantages of external paint for metal PF

Alkyd enamel is not only intended for painting metal. It is universal and can be used to finish other surfaces. The base of this paint allows it to be used in combination with other types of dyes and primers, without fear that bad reaction. To dilute the composition, you can use solvent and white spirit. It is possible to use gasoline, but in this case the coating will not be glossy or shiny.

Disadvantages of finishing material:

• The coating takes a long time to dry (with room temperature this will take about a day, and in cold weather it is impossible for the dye to dry completely);
• the low adhesive properties of the material force the use of appropriate primer;
• low quality coating;
• under the influence of ultraviolet light, the color quickly fades and loses its shine;
• After complete drying, the coating may change color.

Note! When adding coloring pigments to the composition yourself, you need to prepare the mixture with a reserve. If there is not enough paint, you will not be able to get the same shade in the second portion.

Advantages of PF compositions:

• high-quality dye retains its properties for many years;
• a simple application system allows you to do it yourself;
• the use of rollers with foam rubber coats is allowed, since the composition does not contain aggressive solvents that can corrode the tool;
• a wide selection of colors and the possibility of tinting;
• no need to use primer.

Solvent R-4 can be used as a paint remover from metal. It should be used very carefully, since the solution is aggressive and can cause chemical burns.

Properties, advantages and disadvantages of rubber black paint for metal

Rubber paints were invented as an alternative to bitumen compounds. The reason for this was the ugliness of the latter. Dyes based on natural bitumen resin form a dense and durable coating on metal surfaces. A similar finish is obtained when using rubber compounds, with the same properties, but with attractive external characteristics.

On sale there are not only rubber matte paint for black metal, but also compositions of other colors, for example, red, blue, green. These materials have several important advantages:

• high level of protection from external factors;
• resistance to mechanical damage;
• if necessary, the coating can be easily removed by using metal paint remover;
• can be used as a finish on galvanized surfaces, so the dye is suitable for protecting the roof;
• the composition fits perfectly on any type of surface;
• there is no conflict reaction to other dyes.

When painting with rubber dye with a matte surface outdoors, be sure to use protective equipment, since the mixture is toxic. If the composition comes into contact with the skin, irritation or an allergic reaction may occur.

Rubber coatings have few disadvantages, but they do exist:

• complex application technology;
• Not all application methods can be used for painting metal surfaces;
• it is difficult to obtain a uniform coating without gaps, but only under this condition will the dye provide a full level of protection;
• high price.

Types and properties of powder paints for metal

The range of manufacturers allows you to buy powder paints for metal in two categories:

1. Thermoplastic mixtures - during the formation of the film coating, no chemical transformations of the composition occur.
2. Thermosetting compounds - the coating is formed as a result of chemical processes.

Helpful advice! Thermosetting compounds are best used for processing metal parts of a vehicle, since this category of coating is aimed specifically at the automotive industry.

Price powder paint for metal varies depending on the type of composition. This type of dye is presented in a huge variety.

• epoxy;
• epoxy-polyester;
• polyester;
• polyurethane;
• acrylate.

Why is it profitable to buy powder paint for exterior metal work:

• simple system of use and application;
• high hardening speed;
• economical consumption (the loss of conventional dye during operation sometimes reaches 40%, while the powder composition reaches 98% of the surface being treated);
• high level of coating strength;
• environmental friendliness;
• durability;
• excellent decorative properties.

Related article:

Types of anti-corrosion coatings, their application, popular brands, reviews and prices. Effective methods fight against rust.

Among the disadvantages, one can note only the need to use a separate container for each color, as well as limitations when painting non-standard objects and surfaces at low temperatures. Removing the coating mechanically carried out only from wood or plaster. In other cases they are used chemicals. You can use DOCKER S4 metal paint remover.

Advantages and disadvantages of 3 in 1 hammer paints for exterior metal work

Hammer effect dye is considered one of the most durable and resistant coatings. These three-component compositions form a specific pattern on the treated surface, reminiscent of blacksmith's embossing made with a hammer.

Advantages of hammer dyes:

• there is no need for preliminary thorough cleaning or priming of the surface;
• high rates of adhesion to metal surfaces;
• resistance to mechanical damage;
• invulnerability to moisture and ultraviolet radiation;
• the pronounced texture of the coating allows you to hide unevenness and defects of metal surfaces;
• wide range of colors;
• the coating retains its properties for many years;
• there is no need to frequently update the paint layer.

Helpful advice! To thin the paint, it is better to use xylene or a chemical solvent. The use of gasoline is allowed provided that the composition comes from a high-quality and reliable manufacturer. Only in this case the technical and operational characteristics of the coating will not be affected.

Disadvantages of hammer effect coating:

• high price;
• high consumption;
• the application system has certain nuances that complicate working with some objects;
• It is extremely difficult to remove the old coating.

Average prices of metal paints for exterior use

Having decided on the advantages and disadvantages of hammer, rubber, acrylic paints for metal and other coatings, do not forget about the prices. After all, the cost of the composition can influence the choice of material, as well as affect its pros and cons.

Average prices for metal dyes for outdoor use:

Type of finishing material	Name	price, rub.
Aerosol dye	Stainless steel (520 ml)	123
	Stainless steel for non-ferrous metal (520 ml)	159
	Stainless steel in RAL color (520 ml)	173
	Celsite (520 ml)	177
	Tsikrol (520 ml)	179
Alkyd enamel	Stainless steel (0.9 kg)	285
	Stainless steel (3 kg)	835
	Stainless steel (10 kg)	2680
	Stainless steel (20 kg)	5000
Rubber paint	VD-AK-103 (3 kg)	599
	VD-AK-103 (6 kg)	1333
	VD-AK-103 (12 kg)	2140
	VD-AK-103 (40 kg)	6979
Paint for galvanized metal and black	Serebrol (0.8 kg)	399
	Serebrol (3 kg)	1182
	Serebrol (10 kg)	3830
	Serebrol (20 kg)	7460
Hammer effect coating	Molotex (0.8 kg)	407
	Molotex (2.5 kg)	983
	Molotex (17 kg)	6273
Powder paint	Ripol black-carbon black RAL (25 kg)	9460
	Ripol with silver glitter	20 650
	Teknos brown-beige (20 kg)	9990
	Teknos Infralit RAL matte	11040

Choosing the best metal paint for exterior use

Of all the dyes that were previously listed, hammer-effect coatings have the highest performance in terms of basic quality criteria. By external characteristics the coating has similarities with rubber dyes, since both have a similar consistency. However, these materials are completely different composition, and a different binding component is used for their manufacture.

The only significant disadvantage of hammer paint is its high price. Its use will be cost-effective only if a small surface is treated, because the application of this composition is accompanied by high consumption. If in financially There are no restrictions, then hammer paint can be considered as perfect option for finishing metal surfaces outdoors.

Important! Hammer paints must be used in combination with primer of the same brand. Subject to maintenance this requirement, the service life of the coating will be at least 20 years.

Comparative characteristics of dyes:

Characteristic	Types of dyes
	Aerosol	Alkyd	Rubber	Powder	Hammer
UV resistance	1	2	2	3	4
Moisture resistance	1	2	3	3	4
Resistance to mechanical stress	1	1	2	3	4
Adhesion level	1	2	2	3	4
Price	1	1	2	3	4

The table clearly shows the advantages and disadvantages of various types of dyes according to the main parameters, where 1 is the lowest and 4 is the highest.

Popular paints for galvanized metal for exterior use

Not every type of dye is suitable for finishing a galvanized metal surface. That's why there is separate category materials intended for these purposes. Moreover, such paints are produced both in the form of a powder, which requires dilution, and in the form of a ready-made mixture. Composition that does not require preliminary preparation, packaged in jars, buckets and aerosol cans.

According to consumer reviews, Tsikrol paint for galvanized metal is the most popular in this category. Buyers note ease of use and high quality coatings using any method of application, including brush, roller and airless devices.

No less in demand are Zinkomet compositions, which are noted by users as easy-to-use dyes with optimal parameters and cost. The only drawback is the limitations for applying coatings at low temperatures, but most users on the forums consider this nuance to be unimportant.

Basic colors are represented by a small number of shades, which usually include white, silver, black, brown and green. A special place is given to anti-corrosion silver paint for metal, the price of which is more than affordable.

Possibilities of Hammerite hammer paint on metal

Among hammer coatings, Hamerite metal paints from the manufacturer Akzo Nobel are especially popular, which offers customers a lot of advantages:

• protection of metal surfaces from corrosion damage both indoors and outdoors;
• spectacular appearance is ensured due to the unusual texture and varied color range, including standard and exclusive shades;
• high level of adhesion even over rust and maintaining an attractive appearance for at least 8 years;
• operating temperature range is from -20 to +85°C.

Subject to short-term exposure to high temperatures, the coating will retain its attractiveness (up to +150°C). For at least 5 years, there will be no changes in color in the finish under the influence of UV. These and other numerous advantages have made Hammerite paint so popular in the market.

The modern range of paints and varnishes offers hundreds of options high-quality finishing. However, there is no universal composition. When choosing a finish, you should first of all be guided by the type of material of the surface being treated, budgetary options and the benefits that the dye can offer.

The mechanism of the appearance and growth of corrosion is simple. The unprotected surface of the metal, interacting with water and oxygen, begins to oxidize. Its structure changes, becomes loose and porous, and loses its visual appeal.

But external manifestations of corrosion are half the trouble. The pores of rusted metal attract moisture even more and better retain it inside, accelerating destructive processes. As a result, the product loses strength and its service life is reduced.

Conventional anti-corrosion paints and varnishes protect metal well from rust, creating a moisture-impermeable film on its surface. But in order for them to adhere well to the surface and perform their functions efficiently, the products must be cleaned of the destroyed layer before applying them, then covered with an anti-corrosion primer, and only after it has dried with paint.

The difference between rust paints and regular metal paints

Multi-stage processing takes too much time, requires large material and physical costs, which is not always justified. A less labor-intensive, and often more economically advantageous, way to protect metal has become the use of special paints that can be applied directly to the rust, bypassing the preparatory stages.

Packages with this paint are marked “3 in 1”. This means that the composition performs three functions at once:

• converts rust particles;
• primes the surface;
• creates a monolithic decorative waterproof layer on it, which is also resistant to various chemical compounds.

Rust paint has several important advantages, many of which are missing from conventional paints. decorative compositions, intended for metal products.

1. It can be applied to metal already affected by corrosion. It is not necessary to completely remove the rust to expose the intact layer.
2. Created by paint protective layer repels not only water, but also dirt, maintaining a neat appearance of the product.
3. Such compositions are characterized by high adhesion - they stick well to the damaged surface and create a uniform covering layer on it.
4. The service life of such coating is usually very long - from 3 to 15 years. It depends on the composition and manufacturer.

Like conventional decorative coatings, paints that can be applied directly to rust are available in the most different colors and shades.

Types of anti-corrosion paints: composition

The properties and scope of application of rust paints are determined by their composition. And mainly - the type of base. Based on this criterion, they are divided into oil, alkyd, acrylic, and epoxy.

Find out how to paint a ceiling, and also check out the characteristics, advantages and preparatory work in a special article on our portal.

Prices for anti-corrosion paints

Anti-corrosion paints

Types of paints: method of application

The consumption of paint compositions depends on the method of application. This can be done using the traditional method - with a roller or brush. If the paint can be sprayed, its consumption is reduced to 20-30%. And aerosol paints in spray cans are characterized by increased consumption.

The choice of method depends on the type of surface to be painted. For example, solid metal parts With large area You can paint them any way you like, but it’s easier to spray paint on openwork ones. It is also easier to paint hard-to-reach places with a spray bottle.

Note. At proper preparation surface and compliance with the painting conditions, the durability of the finished coating will be the same regardless of the method of applying the paint.

Popular rust paints

Among the many brands of special rust paints, there are those that are especially popular. It is determined not only by positive customer reviews, but also by sales volume.

Hammerite

This brand is a confident leader, despite its fairly decent price. This is due to the quality of the coating, its durability, beautiful texture and versatility. Hammerite anti-corrosion paints are used for decorative finishing ferrous, galvanized and non-ferrous metals, wood, plastic. They are used for finishing exterior and internal structures. Apply to new and previously painted surfaces.

When choosing paint of this brand, you should pay attention to the series.

"Lakra" Hammer Effect

Another effective one protective agent with a hammer consistency. Made on an alkyd-styrene base, it is characterized by its low price and good adhesion to metal surfaces with a rust layer thickness of up to 0.1 mm. Can also be used for painting wooden structures, creating a coating with a metallic sheen on them.

"Lakra" Hammer Effect

Universal paint from famous company Caparol for decorating metal surfaces indoors and outdoors. It is easy to apply and has good resistance to fading.

"Nerzhamet"

Alkyd paint Nerzhamet is available in regular form and in aerosol cans. It contains polymer inclusions, is very easy to apply, dries quickly and adheres well to the rust-affected surface, forming a hard semi-gloss film. Its service life without the need to renew the coating is six years.

"Prestige". Primer-enamel

Another inexpensive domestic product, characterized by a high drying speed, high resistance to moisture and other aggressive environments, and economical consumption of a maximum of 120 grams per square meter. Diluted with solvents such as xylene or R-4 to the desired consistency.

"Prestige". Primer-enamel

This paint is actively used for finishing galvanized metal roofs, external pipelines and fences.

"Stop rust"

Like most other alkyd enamels, this composition can be applied by any means. Available in packaging of different volumes: buckets, jars, aerosol cans. It is used to paint external structures made of steel and cast iron, including those with old paintwork. Penetrates well into the deteriorating metal structure and blocks the spread of rust.

"Stop rust"

"Cycrol"

Even galvanized steel under the influence of precipitation, sun rays and aggressive impurities contained in the air will corrode over time. Designed to protect it special remedy 3 in 1 “Cycrol”, which has high adhesion to such surfaces.

It consists of acrylic resins, organic-based solvents and additives that increase the resistance of enamel to wear, moisture, low temperatures, corrosion and other atmospheric influences. It has good coverage, water-repellent properties and the ability to dry quickly after application.

Advice. The paint contains volatile toxins that evaporate into the air from the fresh, not dried composition. Therefore, while working with this product, it is necessary to protect the respiratory system and skin.

Heat-resistant paints

Not all rust paints can withstand high temperatures. They are designed for heating no higher than 40-60 degrees. But such things also need protection from corrosion. metal constructions, such as stoves, barbecues, fireplaces, pipes and radiators, car parts and other equipment.

To decorate them you need to use heat-resistant and heat-resistant paints. The degree of their stability is determined by the composition of the components. Among these dyes there are also several different types.

Types of heat-resistant paints	Composition and application
	Alkyd paints with the addition of zinc and phosphate compounds are designed to withstand temperatures up to 100 degrees. They can be used to color elements heating system– radiators and pipes that do not heat above 90 degrees.
	Epoxy compounds can withstand temperatures up to 200 degrees. Some of them require an anti-corrosion primer to be applied. Can be used to create a protective coating on components and parts of technical equipment.
	Epoxy ester and ethyl silicate paint compositions with metal powder as additives can withstand a maximum temperature of 400 degrees. And one-component silicone based on polymer resins - up to 650 degrees. This suitable paints for protective and decorative finishing of outdoor barbecues.
	The most heat-resistant paints contain particles of composite materials and heat-resistant glass. They are used to paint metal stoves and fireplaces that can heat up to 800-1000 degrees.

Prices for heat-resistant paints

Heat-resistant paints

It is important! In the vast majority of cases, all these structures should be painted in a cold state, and heated after the coating has completely dried. Although there are paints that require heat to polymerize. Therefore, carefully read the instructions with recommendations for use.

Decorating metal structures using rust paint

Three-in-one metal paints can be applied to any metal structures, even those damaged by corrosion. In this case, pre-treatment with a special primer is not necessary, because such paints already have the properties of this composition. In addition, they convert rust into a monolithic layer and are excellent decorative materials.

Thanks to these features, painting any metal structures with such paint is much easier than with conventional compositions that require careful preliminary preparation of the metal surface.

Regardless of the application method, the work procedure consists of only a few steps.

Step 1.Surface of the metal using a stiff brush, spatula or sandpaper with a coarse abrasive, clean off dirt and the flaking upper rusty layer.

Step 2.The cleaned product is wiped with a solvent, moistening a cloth or sponge in it. And let it dry.

Step 3.Preparing the paint involves mixing it thoroughly. Or shaking the can if using an aerosol. It is advisable to rub a brush with natural bristles on sandpaper so that poorly adhering bristles fall out and do not remain on the paint coating.

Step 4.The paint is applied to the surface in an even layer and allowed to dry for the time specified in the instructions.

Step 5.Then apply a second layer, trying to avoid drips.

If the paint is applied or sprayed from a can, then more layers will be required - at least three. Between them it is necessary to observe a time interval for drying.

Prices for paint sprayers

Spray gun

The can or gun should be shaken before work and periodically during work, and the sprayer should be kept at a distance of 20 cm from the surface to be painted.

The modern market of finishing materials is constantly updated with new products that simplify the work of finishers and have improved decorative and operational characteristics. Rust paint – shining example such innovations.

Video - 3 in 1 rust paint

Despite the emergence of many new materials manufactured in accordance with techniques developed in the century innovative technologies, metal, which is ubiquitous as an external finishing material, does not plan to lose its position. However, its specific characteristics necessitate the introduction of paint and varnish materials in the construction industry that prevent premature failure of metal surfaces, which, despite the strength and durability of the metal, is not uncommon. Metal structures have become an integral element of multi-apartment buildings, the design features of which imply the presence of metal water supply and heating pipes, and metal fencing on balconies and staircases. Suburban construction uses metal structures even more actively - small architectural forms, greenhouses, gates and window bars - all of this is made primarily of metal. The choice of metal is determined by its unique characteristics, including mechanical strength, and increased resistance to high temperatures, and relative availability. Despite many advantages, metal also has its vulnerabilities, the presence of which determines the use of paint for metal and rust.

About rust and ways to combat it

As you already understand, the main disadvantage of metal is its low resistance to corrosion, which is expressed not only in the deterioration of the appearance of metal structures, but also in a shortening of its service life. In order to understand the principle of action of anti-corrosion agents, let's consider the basic terminology. Rust is the result of oxidative processes occurring on the surface of the metal. Metal structures undergo oxidation when the air contains a large number of water vapor, under the influence of which the strength of the metal decreases and its original attractiveness is lost. Progressive corrosion, penetrating into the material, attracts moisture and is retained inside the metal due to its porous structure. How to deal with the destruction of metal, which, with constant contact of the material with aggressive external environment and the absence of special measures to prevent the destruction of metal, will it only progress?

Traditional methods of metal protection involve cleaning off rust, after which the metal surface is treated with anti-corrosion primer and only then with protective paint. However, from the point of view of material and time costs, these measures are not always justified, which necessitates the search for new, cost-effective and less labor-intensive ways to protect metal from corrosion. And they were found. Today, the procedure in this situation looks somewhat different.

To avoid progressive destruction of the material, use paint and varnish compositions designed to prevent the oxidation process on the metal surface.

Classification of paints and varnishes for metal

Before we consider in detail the characteristics and use of rust paint, let’s consider the main types of metal paint:

• Epoxy enamels;
• Oil paints;
• Alkyd paints;
• Acrylic paints.

Epoxy enamels, due to the toxicity of their constituent components, are used extremely rarely in everyday life. The material, made on the basis of silicone resins, is designed to protect metal structures from exposure to high temperatures.

Oil paints, the main components of which are drying oil and natural oils, due to their low resistance to temperature changes, are intended mainly for interior finishing work. This limits their use as a material for external finishing works, since oil paints will not provide adequate protection of metal structures from corrosion.

For alkyd paints, used for painting galvanized metal surfaces, also have their own advantages and disadvantages. Despite the fact that alkyd paints are characterized by the greatest adhesive ability, they are not resistant to high temperatures and are extremely flammable.

Although acrylic paints for metal are characterized by a relatively recent appearance on the market; currently they are characterized by growing popularity, which is explained by a number of functional characteristics this type of paint and varnish materials. Thanks to durability and guaranteed protection metal from corrosion, they are used for both internal and external finishing works. In addition, they demonstrate their effectiveness when painting heating elements and other high-heat parts.

Anti-corrosion paints: scope and characteristics

As you may have guessed, not all metal paints are capable of providing optimal protection of the material from corrosion and premature loss of its original characteristics. In this regard, when considering the classification of paints for metal, it is necessary to separately consider standing paint by rust. Among consumers, the most popular representative of this group is Hammerite rust paint.

Knowledgeable developers, whose goal is to carry out repair work with minimal economic costs, prefer to buy rust-resistant paint to protect metal from rust. This will not only allow you to avoid carrying out rather labor-intensive and expensive work, which are not always justified, but will also significantly simplify technological process applying anti-corrosion coating. Anti-rust paint, the price of which depends on the manufacturer and technical variety paint and varnish material, is a quick-drying one-component paint made on the basis of epoxy-modified synthetic resins with the addition of anti-corrosion pigments, which provides the most effective and durable anti-corrosion protection and a finishing coating with high decorative characteristics.

Thanks to a carefully selected composition of synthetic resins by a team of specialists, the use of Hammerite rust paint allows you to obtain a glossy, semi-matte and hammer finish, the features of which will be discussed below. The main advantage of this coating is its ability to resist the accumulation of dirt, which plays an important role in the formation of rust. The scope of application of rust paint is extremely wide: today it is used both in private construction and in the industrial industry, for example, for painting roofing systems, gas and water pipes, equipment, machine tools and agricultural tools, as well as other metal structures that require anti-corrosion protection.

The inclusion of high molecular weight silicones in the paint provides additional properties of the paint, the essence of which is to prevent the negative effects of moisture on metal surfaces. The wetting properties of the paint make it possible to apply it to completely unprepared metal surfaces. The operating temperatures of metals treated with an anti-corrosion compound are between -20 and +80 degrees, which, coupled with resistance to destruction under the influence of ultraviolet radiation, allows the use of rust paint in hot and humid climate zones.

Advantages of rust paint

Let's summarize the above and highlight the main advantages of rust paint:

• Possibility of application directly onto rusty surfaces and poorly prepared surfaces;
• The ability of paint to form a weather-resistant coating characterized by water- and dirt-repellent properties;
• High covering ability;
• High level of adhesion to surfaces affected by rust;
• Characterized by high corrosion resistance;
• Dries in a short period of time;
• Long service life of the coating, reaching 8 years;
• Wide variety of factory shades.

Despite the large number of advantages, the anti-corrosion coating also has its disadvantages:

• It is prohibited to paint equipment whose operating temperatures exceed 150 degrees;
• The application of anti-corrosion coating to metal structures whose surface is in contact with drinking water is excluded.

Features of hammer paint for rust

The color palette includes a variety of shades, including glossy and semi-gloss colors, semi-matte and hammer shades.

Rust hammer paint got its name due to the fact that the surface coated with it visually resembles the surface of a hammer head, that is, it is characterized by the same barely perceptible roughness and metallic sheen. The production of hammer paint is carried out using alkyd-styrene, acrylic and epoxy bases, and with the addition of fine glass and aluminum powder.

Due to the increased resistance of hammer paint to high humidity, temperature fluctuations and vibration influences, hammer paint is used to treat the surfaces of industrial equipment, as well as to create durable anti-corrosion coatings not only for ferrous, but also non-ferrous metals. The main advantage of hammer paint is the ability to apply directly to rust without prior preparation and create an airtight protective film due to the content of special binders.

Applying anti-corrosion paint to the surface: preparation

The work process when applying anti-corrosion coating is standard. Since the surface to be painted must be clean, dry and free of grease, it is recommended to carry out standard preparation before painting, which involves cleaning the surface with a wire brush in two directions or evenly passing sandpaper along the contact surface of the material. Having examined the surface condition for the presence of sharp corners and discovered large residual irregularities, they are removed using a crusher. However, experts do not recommend getting carried away with such drastic techniques as using a crusher and drill with an appropriate attachment, as they can cause damage to the metal surface and even compromise its integrity. Surfaces that have previously been painted should be cleaned not only of dirt, dust and grease, but also of old paint, after which it is thoroughly washed with water and dried.

If you are dealing with surfaces that have developed rust, next stage- choice optimal method, which will cope with rust removal before painting. If you use paint that contains a rust converter to protect a metal surface from corrosion, there is no need to focus on existing rust and achieving a metallic shine on the treated surface, since this type anti-corrosion paint converts rust residues, the thickness of which does not exceed 30 microns, into a primer layer.

Despite the fact that rust paint manufacturers claim that their products can be used without prior priming, we advise you not to refuse to apply a layer of primer, which helps to increase the adhesive ability of the anti-corrosion paint and extend the service life of the applied coating. Another thing is primer paint for rust, the application of which does not require preliminary priming.

Primer enamel for rust: features

It is practiced to apply primer-enamel on different kinds surfaces made of metal, including those damaged by rust, without necessarily applying a primer first. This is due to the primer-enamel effect, called “three in one,” that is, primer paint for rust combines the properties of a primer for metal, anti-corrosion paint and enamel for metal. As a result, the procedure for working with primer-enamel is significantly simplified:

• The metal surface is cleaned of dirt, dust and grease, as well as the top layer of rust, which will require the use of a metal spatula, brush or sandpaper, and wiped with a solvent.

• The primer-enamel is first thoroughly mixed and applied to the metal sequentially in two layers. In this case, before applying the second layer, wait 30 minutes, which is the minimum period of interlayer drying time, which can be extended up to 5 hours. If after 5 hours you have not been able to apply the second coat of primer-enamel, you must postpone its application for another 30 days.

Method of applying anti-corrosion paint

Before applying paint, the surface is thoroughly degreased using a solvent and dried. Experts recommend paying attention to the conditions environment, the most optimal for painting. The recommended air humidity should be at least 80%, and the ambient temperature should be 20 degrees above zero. Professionals who have experience working with anti-corrosion paints advise not to pay attention to the manufacturer’s recommendations, according to which work with paint can be carried out at temperatures of 20 degrees below zero, since these recommendations are relevant mainly for force majeure circumstances.

• After cleaning the surface, the anti-corrosion paint is thoroughly shaken and a solvent is added in a ratio of 9:1. If you are using Hammerite paint, experts recommend using Hammerite Brush Cleaner & Thinners. The paint is applied in three layers, with the second applied three hours after applying the first layer, otherwise, the application of the second layer of paint is postponed for 6 weeks. Failure to follow these recommendations will result in unevenness on the painted surface. If these recommendations are neglected and paint is applied in more than three layers, it may drain from the metal surface, which will lead to a significant reduction in the performance characteristics of the anti-corrosion coating. After applying metal and rust paint, make sure all edges and corners are thoroughly painted.

• If the surface has been previously painted, anti-corrosion paint is applied in two layers in compliance with the above recommendations.
• If you prefer to apply the paint using a spray gun, you can thin the paint with xylene. However, here too the manufacturer must indicate his recommendations: most often the instructions give restrictions on the volume of added solvent depending on the initial volume of paint. In most cases, they make up no more than 15% of the original volume of anti-corrosion paint. Dilution of paint with Nitrocellulose solvent is excluded.

When applying paint using a spray gun, there are also a number of specific recommendations:

• Paint is applied in at least 3-4 layers, with the time interval between layers not exceeding 15 minutes;
• The distance between the surface to be treated and the spray gun must be at least 20 cm, pressure - no more than 2 bar;
• To obtain a homogeneous mass and color, which is necessary for the final coating to be uniform, the gun is thoroughly shaken before and during use;
• Despite the fact that the final layer should be much thicker, it is necessary to strictly ensure that there are no unevenness and that the paint does not settle or flow down the surface.

Given the wide variety of metal surfaces, experts give a number of general recommendations, which must be taken into account when working with anti-corrosion paint:

• In the case of painting the radiator and heating pipes, it is necessary to give preference to heat-resistant paint and primer, the operating temperatures of which are within 150 degrees;
• Painting of heating pipes must be done when they are cold, that is, before the start of the heating season;
• Painting stove elements determines the need to use even more temperature-resistant paint, the temperature of which can reach 400-500 degrees;
• Painting surfaces made of non-ferrous metals necessitates the use of special primers, since the usual ones intended for ferrous metals are not suitable;
• In the case of work at industrial facilities carried out outdoors, manufacturers recommend the use of organic solvents.

This phenomenon of metal oxidation and its gradual destruction under the influence of moisture is known as corrosion. But how to deal with it? If the rusted area is large, then it can only be restored with the help of complex work, but small areas can actually be protected by using rust-resistant enamels.

Types of anti-corrosion protection

To treat small areas or to prevent corrosion, rust enamel primer is used. This paint combines three properties: enamel, primer and rust converter. But anti-corrosion paints are just a general name for drugs that differ in their composition. Depending on the anti-corrosion components included in their composition, they are divided into the following groups.

Insulating

This primer-enamel for metal, after drying, forms a durable film that blocks access to the base of water and oxygen. These dyes are usually made from red lead and additionally have heat-resistant properties.

These characteristics allow them to be used for street work and for painting surfaces in water. Quick-drying: after just 2-3 hours this coating provides reliable anti-corrosion protection.

Passivating

This primer-paint is used to slow down the development of corrosion. The anti-corrosion substances included in its composition chemical formula significantly slow down the occurrence of oxidative processes. Suitable for use in areas of high humidity.

Converter

Contains orthophosphoric acid. Acid after chemical reaction with iron oxide (corrosion) forms iron phosphate, which is strong and inert to oxidative processes. The use of converters allows not only to protect the structure from destruction, but also to partially restore the damaged metal base.

Phosphating, two-component

The composition includes orthophosphoric acid and passivating additives. It has low consumption when applied to the surface and has high adhesion. Coating with such paints is possible even for galvanized metals, which are almost impossible to treat with other anti-corrosion agents.

Tread

Anti-corrosion enamel with tiny metal particles dissolved in it forms a durable metallized coating after drying. The use of paints with protectors is recommended in conditions of high humidity.

Quick-drying primer-paint not only has high anti-corrosion qualities, but is also economical: its consumption per 1 sq.m is small.

Protectors are often used to paint boats or metal piers in the water.

Inhibitory

It contains a unique formula. This primer-enamel for rust gives the oxidized structure, after interacting with it, the properties of a primer. Inhibiting paints dry quickly and have high adhesive properties.

Their disadvantages include the large consumption of material, compared to other primer-paints, caused by abundant impregnation of the rust structure. But, despite this small drawback, inhibitor paints are most in demand for providing anti-corrosion protection and decorative painting of metal products.

The dye selected in accordance with the technical characteristics will stop corrosion only if:

1. The rust area is small.
2. Rust has a strong adhesion to the metal base.

The use of three-in-one paint for large damage to the product or on a loose, fragile rusting area does not provide a positive anti-corrosion effect. Such violations of the metal structure require major restoration work.

Examples of materials

Among the available paints, “Dali” from the Rogneda company, as well as “Stop Rust” enamel primer, stand out. The consumption of “Stop Rust” material is from 80 to 150 g for each square meter. One liter of Dali paint, according to the technical specifications, is enough to cover 12 square meters.

How to choose a dye

Primer enamel for rust, which combines the properties of a decorative coating, primer and rust protection (three in one), is recommended to be selected taking into account the following parameters:

1. Type of metal. Depending on the type of alloy, the type of anti-corrosion protection is selected, as well as the type of base (water or oil).
2. Impacts on the product (humidity, temperature changes, likelihood of mechanical damage).
3. The degree of protection of the dye, what kind of coating it forms on the surface (a type of protective film).
4. The nature of corrosion (whether it develops quickly or not, the size of the damaged area, etc.).
5. Drying speed. For outdoor work or when painting surfaces in contact with water, quick-drying paints should be used.
6. Toxicity. Most anti-corrosion dyes that provide a durable protective coating are highly toxic, so it is recommended to work with them in a well-ventilated area, using gloves and a respirator. The degree of toxicity can be determined by studying the composition indicated on the package.
7. Economical. In most cases, anti-corrosion agents have a small consumption per 1 sq.m. Relatively high consumption is associated either with the increased protective properties of the product, or with the friability of the rusted surface.
8. Decorative. Unfortunately, all paints that help prevent or eliminate minor corrosion damage are only available in black, gray or brown colors. But when purchasing a coloring agent, you should pay attention to the shine: matte or glossy.

How to choose a tool

Most three-in-one paints contain aggressive chemical compounds that corrode artificial fabrics. For application coloring matter The following painting tools are used on a metal base:

1. Brush. Due to the aggressive substances contained in most primer paints, brushes should be chosen with natural bristles. To distribute the product evenly without drips, experts recommend purchasing thick, wide brushes.
2. Roller. It is better to choose a “coat” for the roller from velor or polyacrylic with medium or short pile. Before purchasing a roller, you should study it to find out what dyes it can be used for.
3. Spray gun. Only models that do not have plastic parts are suitable (plastic is deformed under the influence of anti-corrosion substances).
4. Spray can. The product produced in cylinders, despite its economical consumption and ease of use, is rarely used due to great prices. It is recommended to use a spray can when you need to paint a small area.

In addition to the tool, to apply the coloring agent you will need:

• metal brush;
• water and detergent;
• degreaser.

Having prepared everything you need, you can start working.

How to paint

Before you begin applying anti-corrosion enamel, the base must be prepared for work so that the painting has the maximum protective effect. To do this you need to do the following:

1. Clean with metal brush corrosive damage by removing loose pieces of rust. You can clean it using grinder with an appropriate attachment, except for the area affected by rust. It is recommended to additionally sand the surfaces adjacent to it.
2. Rinse thoroughly the entire area to be painted and dry thoroughly. Depending on the size of the item, it can be washed under running water, using a cloth or using a portable car wash. The use of a car wash, as practice has shown, gives more high-quality cleaning surface due to the fact that water from detergent supplied under pressure.
3. Treat with a degreaser. White spirit, gasoline or other quick-drying solutions can be used as a degreaser. If it is not possible to completely degrease the structure, then it is necessary to at least treat the rusty areas with a solution. If you do not use a degreaser, the adhesion of the primer-paint to the base will significantly deteriorate.

Only such preparation will help to say “stop” to rusting. After the degreasing solution has dried, the dye can be applied. For long lasting results experienced craftsmen advise:

1. Apply primer-enamel in at least 2 layers, and re-painting should be carried out only after the previous layer has completely dried.
2. Apply the second layer after the previous one has dried, but no more than after 5 hours. If more than 5 hours have passed, then you should find out in the instructions the time for complete polymerization of the composition (usually 25-30 days) and only after this period re-coat. Failure to comply with this recommendation will result in a decrease in protective qualities primer-paint and to the fragility of decorative finishing.

If you choose the right enamel primer with corrosion protection depending on the nature of rusting and the operating conditions of the product, and also follow all stages of applying the paint, you can obtain reliable and long-term protection of the metal structure from the development of corrosive changes.

Among all painting work painting metal and metal surfaces is rightfully considered one of the most difficult. No, it’s not the difficulty of applying the paint itself; the process here is no different from any other. It’s just that exterior metal paint must be very stable and not lose its properties after several seasons. We will talk about what types of metal paints there are, their characteristics and which one is the best in this article.

The marking name for nitro paint is NC, but most people are more familiar with it as spray paint. This is an ideal option when you need to paint a small product, and you don’t want to buy and paint a whole jar. In addition, paint in cans is applied by spraying, so there are no stains on the surface from a brush or roller.

Paint is diluted with any brand of chemical solvent, and the higher the number in its name, the greater the shine of the painted surface.

As for applying nitro paint, you can use any affordable way, from a simple brush to a pneumatic spray gun. The only limitation is the foam coats on the roller, which the nitro paint instantly corrodes.

Of course, using such paint when working with large volumes is at least impractical, and this material has more disadvantages than advantages.

Minuses

This:

• Low adhesion to the surface, as a result of which the paint becomes unusable after just a few years.
• A very unpleasant and toxic odor that is quite capable of causing harm to health.
• Low resistance to ultraviolet rays. Simply put, paint fades quite quickly in the sun.
• High consumption per square meter of area.
• Does not interact with other types of paints and dissolves them.

pros

This:

• Relatively low price, especially if you buy paint not in aerosol cans, but in standard cans.
• Fast drying. You can work with nitro paint even with negative temperature, and the time for complete drying will be only a couple of hours. And in the warm season, complete drying of one layer takes several minutes.
• Easy to apply in any way.
• If necessary, nitro paint can be easily removed with a regular solvent.