paints and varnishes

How to make a primer for metal yourself

As you know, metal is a material that is unstable to corrosion, so a primer is used to protect it from this unpleasant phenomenon. In addition, the primer is able to extend the life of metal surfaces, protecting them from many negative environmental factors. We will talk further about the methods of self-production of a primer for metal.


Primer for metal – characteristics, description, types

Any type of primer contains special substances called inhibitors. With their help, it is possible to ensure the protection of the metal, first of all, against corrosion..

After applying any type of primer to the surface, a protective film is formed, which prevents the effect of moisture, fungus, corrosion and other irritants on the object..

Also, another task of the primer is to improve the adhesion between the surface to be painted and the coloring composition or finishing material. Therefore, before performing internal or external wall decoration, they must be covered with a primer in several layers..

The primer is also an antiseptic agent that prevents the development of mold and mildew on any kind of surfaces. However, in order for all the above functions of the primer to be performed, it is necessary to choose the right composition for a particular application..

In addition, an important role is played by the base on which the soil is applied, the time of work, climatic conditions, etc. In relation to the type of metals, they are non-ferrous and ferrous. Depending on this factor, it is necessary to select a primer.

For aluminum surfaces, it is recommended to use compounds containing zinc or having a urethane base. For steel, a primer that contains zinc phosphate is most suitable. For coating copper, brass or bronze, use epoxy or polyurethane varnish.

We suggest that you familiarize yourself with the main types of primer for metal for external and internal works:

Primer for metal price and selection features

There are certain criteria for choosing a primer for metal, adhering to them, it is possible to choose a material that does an excellent job with the tasks assigned to it..

First of all, decide on the type of metal that can be processed. Next, determine the functional purpose of the primer. You should also take into account the conditions under which the primer will be applied to the surface, this is humidity and temperature, the presence of direct ultraviolet rays. Next, take into account the tool that is designed to apply the primer, it can be a roller, brush or spray gun. Applying a primer with a roller increases material consumption and is relevant only when work is carried out on a large surface area. The brush is the standard option for all surfaces. If the object is still voluminous, then it is better to use a spray gun, which will not only reduce material consumption, but also evenly cover the entire metal object.

The amount of primer consumption for metal is determined by various factors, among which the type of surface, the number of layers applied to it, etc. should be highlighted. When using frost-resistant compounds, before their application, the metal is covered with a moisture-repellent primer. When buying a metal primer, you also need to purchase gloves, a respirator and goggles to protect the person working with the primer. It is especially important to use these products when working with a sprayer..

Metal corrosion primer: features of acrylic compounds

This composition has the fastest drying speed. In addition, the acrylic-based primer does not contain substances hazardous to human health, does not have an unpleasant odor and is environmentally friendly. With the help of such a soil, it is possible:

  • to level the surface and hide certain defects;
  • to mask previously formed surface defects;
  • create a high-quality coating with high adhesion properties.

Please note that the acidic version of the soil does not lend itself to staining. Applying paint to such a surface will lead to its uneven distribution and the appearance of streaks. With the help of acrylic, it is possible to create a durable coating that is isolated from all sorts of harmful influences. In addition, this primer is notable for its low consumption..

Some acrylic based primers come in a variety of shades. Most manufacturers only release the composition in gray..

Quite often, acrylic-styrene substances are used as a primer for metal, which have the following advantages:

  • creating an excellent anti-corrosion protective film;
  • high drying time, regardless of weather conditions;
  • high color fastness that lasts for five years;
  • resistance to temperature changes;
  • resistance to moisture and adverse weather conditions;
  • duration of operation.

Acrylic primer is a universal compound that protects metal from the destructive effects of many factors and at the same time stains it.

Features of the primer for metal for outdoor use

Before considering the compositions for performing metal processing, we suggest that you familiarize yourself with their main functions:

  • the primer provides a better staining of the metal surface;
  • with the help of a primer, it is possible to improve the adhesion between the metal and the varnish-and-paint composition, and the strength of the coating is also improved;
  • reduced porosity of metal surfaces;
  • the resistance of the metal to moisture is improved;
  • the duration of metal exploitation increases.

For outdoor work, use the following options for metal primers:

A compound that converts iron oxides into other compounds. Thus, it is possible to quickly and efficiently rid the metal of rust..

A primer that protects metal from the harmful effects of the environment.

In the presence of mechanical stress on metal parts, these compounds prevent their damage and protect from moisture.

They form a coating on a metal surface in the form of a film that prevents metal from contact with moisture, thus protecting it from corrosion.

They differ in enhanced action due to the content in their composition of two soil options. Have universal application.

How to apply a metal primer: primer coating technology

Before starting work, carefully study the instructions from the manufacturer for the application and dilution of the material. Only then proceed with the preparation of the metal for the application of the primer..

Most often, preparatory work looks like this:

Consider, when choosing a composition for external metal processing, it is necessary to take into account the type of the surface itself, as well as its finish coating, that is, the type of paint used in further work. Some materials are incompatible with each other. When buying paint for metal, study the manufacturer’s recommendations for the optimal type of primer for this paint.

The type of material for surface coating is primarily determined by the functional purpose. Primary compounds are applied to a bare surface to form an anti-corrosion film. The drying time of such compositions is 24 hours or more. Fast drying nitro primers are not used for metal surfaces that will be painted in the future. With the help of separating compounds, it is possible to form a coating between incompatible materials.

An alcohol-based primer is easy to use, as it dries quickly and does not shrink. If you are going to clean rust with a special primer, then anyway, before applying the composition, you need to clean the excess corrosion with a brush.

The metal is coated with a primer in several layers, at intervals until the composition is completely dry on the surface. Preparing a primer for metal at home is almost impossible, since the composition of these materials contains a large number of chemical reagents, which must be combined in a strictly defined proportion.

The enamel metal primer performs several functions at once:

  • converts rust;
  • provides protection against corrosion;
  • decorates the surface by painting it in a specific color.

These compositions dry quickly, are resistant to moisture, corrosion, temperature changes. An elastic film is formed on the metal surface, which is resistant to mechanical damage. In addition, the composition perfectly combines with the metal, transforming rust on it.

However, enamel primers are not recommended for painting objects that are amenable to high heat. Since, due to exposure to the metal of high temperature, the primer gives off an unpleasant odor.