Enamel for metal: selection and application

A variety of compositions can be used to paint a metal surface. But not all of them are equal. It is important to choose the most productive design solutions in a particular case. We understand the specifics of the choice of enamel for metal.

Enamel for metal has one key task: it protects the surface from corrosion processes. A similar measure is needed for those items that will constantly be in the open air or be exposed to the destructive action of water. At the same time, one cannot fail to note aesthetics, since coloring compositions for metal products are able to give them an elegant appearance. If the choice of enamel is far from correct, the technology is not followed, the coating looks bad.

The selection of coloring compositions should take into account their chemical nature and intended purpose. Not every coating can be applied to a specific surface. Most paints, for example, are not suitable for galvanized objects because they have too little adhesion.

Enamels and other paints and varnishes for metal are presented in three main types:

• oil;
• alkyd;
• acrylic.

Two-component blends, polyurethane-based dye combinations and other similar improvements are more likely to fall under the industrial category. They are resistant to corrosive processes and aggressive environments. It is impractical to use such mixtures, despite their high anti-corrosion characteristics, in domestic conditions: the work is costly and insufficiently effective. The oil type is cheaper and can be bought at almost any paint store.

The problem is that such enamels cannot be called quick-drying. Under the influence of sunlight, they quickly fade, losing their visual appeal. The effectiveness of metal protection against rust also leaves much to be desired. Oily paint products are not resistant to high temperatures. They cannot be used for boilers, radiators, it is dangerous.

In terms of anticorrosive activity, alkyd enamels are better. It is not difficult to buy them now. Increased resistance to negative atmospheric influences and temperature changes allows the use of such mixtures when carrying out outdoor work. Acrylic paints and varnishes, which are based on pure water, are recognized as the best choice by the vast majority of practitioners. They are completely safe for the health of painters, do not have an unpleasant odor.

In terms of resistance to strong heat and negative influences of the external environment, combinations based on acrylic are no worse than alkyd counterparts. This allows you to increase the period during which metal objects retain their external attractiveness. Fast drying will appeal to professionals and ordinary customers. Powder coating of metal, with all its advantages, cannot be done at home. The need for a special chamber devalues ​​the high technical qualities of such a coating and its durability.

Chemical-resistant paint is distinguished by its resistance to caustic substances, it must be technological and practical, without creating problems during application.Heat-resistant and fire-resistant enamels have nothing in common, they are mutually exclusive concepts. In the first case, the surface must remain unchanged under the action of strong heating, and in the second, on the contrary, it must swell and cover the base from the effects of the flame. The two-component mixture, in addition to the base pigment, contains epoxy resin, corrosion inhibitors and polyurethane. Typical polyester enamel in most cases creates a glossy finish on pre-primed surfaces.

In addition to these varieties, it is customary to distinguish the following types:

• dielectric;
• polymeric;
• oil and petrol resistant;
• weatherproof.

The palette of enamels for metal includes a variety of shades (glossy, semi-gloss, matte). More often buyers are interested in white and yellow tones. It is advisable to paint radiators and other heating parts in white. The yellowish tone looks elegant and noble in almost any conditions, it perfectly covers rust.

The color of artistic enamel is determined by the color of the metal oxide that is used in production. For example, iron and chromium compounds help to create a red tint. Black enamel is obtained by introducing manganese or iridium oxides. The firing stage is considered a critical stage in the technology. If you ignore them, the color will not be what you want.

When carrying out external work, as well as internal, it is required to carefully prepare the surface. Failure to comply with this requirement can lead to the rapid appearance of rust spots and loss of attractiveness of the appearance of the coating. Painting a tree is more difficult than applying a coloring composition to the surface of metal products: it is porous and readily absorbs paintwork. These coatings differ greatly in their properties and characteristics.

Often, the choice of a specific manufacturer confuses the average buyer. Let us note several companies whose products are in demand today. Russian firm "Tex»Produces high quality enamel for painting metal structures. Among other firms, you should pay attention to the range of companies "Tikkurila", "Hammerite", "Commander"... Regardless of the specific brand, you need to study the actual characteristics.

In the following video, see an overview of düfa Hammerlack 3-in-1 metal enamel.