Ensuring Mechanical Strength of Protective Paint Coatings of Steel Metal Structures

This article discusses the issues of ensuring the mechanical strength of protective paint coatings of steel structures through the use of nano-sized additives. The results of a study of the physical and mechanical properties of nanomodified paint coatings (adhesion, abrasion resistance, hardness, deformation stability) and the results of a study of the linear dimensions of the elements of structures of the micro- and nanorelief of the surface of the coatings are presented. It has been determined that with the introduction of a composition with carbon nanotubes and bismuth oxide, in the amount of 0.1% and 1%, respectively, into the paintwork material, it is possible to achieve high mechanical strength of coatings that can reliably protect steel structures under operating environments and impacts. At the same time, the adhesion strength increases by 2–3 times, the abrasion resistance by 1.5–2.5 times, the number and size of microcracks on the coating are significantly reduced, and the surface of the coating becomes smoother, the coating is strengthened (the average roughness Ra decreases from 60–70 nm to 20–30 nm).

A.V. PCHELNIKOV, Candidate of Sciences (Engineering), associate professor, doctoral student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.P. PICHUGIN, Doctor of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Novosibirsk State Agrarian University (160, Dobrolyubova Street, Novosibirsk, 630039, Russian Federation)

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