Enamel KO-811: technical characteristics and consumption

For a variety of metal products and structures used in the street, not any paint that can protect the material from the negative effects of the environment is suitable. For these purposes, there are special silicone mixtures, the most suitable of which is the enamel "KO-811". Its special anti-corrosion and heat-resistant properties are considered optimal for metals such as steel, aluminum, titanium.

Enamel is a suspension based on silicone varnish and various coloring pigments. There are two types of products - "KO-811", produced in three main colors (red,green, black), and the KO-811K solution enriched with fillers, special additives and the MFSN-V stabilizer. Due to this, its color range is more extensive - such paint is white, yellow, blue, olive, blue, dark and light brown, with a steel shade.

The main difference between the two types of mixture is that "KO-811K" is a two-component material.and in order to dilute it, it is necessary to mix the semi-finished enamel with the stabilizer. In addition, it has a richer color scheme. Otherwise, the characteristics and properties of both enamels are practically the same.

The main purpose of the compositions is the protection of metal parts during operation at temperatures reaching +400 degrees, and low temperature conditions - up to -60 degrees.

Paint specifications:

• The material is resistant to high humidity, the effects of oil and aggressive compounds such as gasoline, which allows its use in devices that have direct contact with these liquids.
• An ideal viscosity of 12–20 units at average room temperature makes it possible to apply quickly and conveniently by means of an electric and pneumatic spray gun.

• After drying on the metal, an elastic film with a thickness of no more than 3 mm is formed, so even small-sized products are subject to staining. In addition, the homogeneity of the layer and its smoothness are the key to preserving the original appearance throughout the entire period of use.
• Heat resistance at critically high temperatures is 5 hours.
• Durable coating is not subject to mechanical damage with pressure and shock.

Enamels of both types before use must be thoroughly stirred until smooth. It is important that there are no sediment particles and bubbles. Therefore, after stirring, the solution is kept for another 10 minutes until they disappear completely.

Enamel "KO-811" diluted with xylene or toluene by 30-40%. The composition of "KO-811K" is provided in the form of a suspension, paint and stabilizer. The degree of dilution of white paint - 70-80%, other colors - up to 50%.

This should be done before the metal surface is prepared. The prepared solution should be used within 24 hours. Sometimes the resulting mixture needs additional dilution for working condition. Then use the solvent "R-5", solvent and other aromatic solvents. To obtain the optimum density, the solution is measured with a viscometer, the viscosity parameters are usually specified in the quality certificate.

If breaks in coloring are supposed, it is better to store the mixture in a closed form and be sure to mix it to resume work.

Preparing the substrate for painting is crucial for proper adhesion to enamel.

It includes two main stages:

• Cleansingwhen dirt, old paint, grease stains, scale and rust are removed. This is done by mechanical or manual method or with the help of a special device - a shot blasting chamber. Mechanical cleansing provides for the degree "SA2 - SA2.5" or "St 3". Perhaps the use of tools for converting rust.
• Degreasing It is produced by xylene, solvent, acetone using rags.It is advisable to do this before the start of painting, no later than a day during internal work. External work must take at least six hours.

Partial metal processing is allowed in good overall condition. The main thing is that before applying the enamel base was clean, dry and had a typical metallic luster.

Works should take place at a humidity of less than 80%, in the temperature range from -30 to +40 degrees. The spray gun will provide high-quality sputtering, the minimum number of layers is two.

It is necessary to consider some subtleties when painting:

• On areas with low accessibility, the joints and edges of the composition is better to apply with a brush manually.
• When using pneumatics, the distance from the tool nozzle to the surface should be 200-300 mm, depending on the apparatus.
• The metal is painted in two or three layers at intervals of up to two hours, if the temperature is below zero, the breaks time is doubled.
• The initial drying requires two hours, after which the polymerization takes place and the final drying takes place, which is completed in a day.

Dye consumption can vary from 90 to 110 grams per square meter, depending on the texturethe grounds, the degree of porosity and experience of the master.

During the work it is necessary to follow safety regulations. Since enamels contain solvents, this determines the III class of danger to human health. Therefore, for quiet work and safety of the process, one should take care of maximum ventilation of the room, personal protective equipment, always have handy materials at hand - sand, asbestos fire-fighting fabric, foam or carbon dioxide fire extinguisher.

About safety when working with similar materials, see below in the video.