Application of Nanomaterials in the Technology of Preparation of Metal Substrates to Improve the Quality of Paint Coatings

The article considers the issues of increasing the operational durability of paint and varnish coatings of various metal surfaces. As a result of a detailed theoretical analysis, it was found that this issue can be resolved by improving the technology of preparing metal surfaces for painting using nanomaterials: when preparing metal surfaces before painting using a chemical method and using functional nanomaterials that help change the physicochemical properties of the metal, chemical processes can occur that help increase the interaction between the metal and the protective coating. One of the greatest attentions in the development of this solution was paid to such a nanomaterial as carbon nanotubes. The use of a suspension based on mixed solvents and carbon nanotubes in the technology of preparing for painting allows obtaining coatings that, compared to traditional ones, have up to three times greater adhesive strength, one and a half or more times better abrasion resistance and resistance to deformation effects, up to two times more antistatic, and also have greater heat resistance and thermal stability. The improvement of the coating properties occurs due to the formation of a uniform dense intermediate layer between the metal and the coating, which ensures increased adhesion and other quality characteristics of the coating, due to the process of chemisorption with the metal surface due to the excess amount of electrons on the surface of carbon nanotubes, as characterized by the results of electron microscopy studies.