Physical and mechanical properties of modified chrome coatings

When solving the problems of improving the metal-surface treatment and giving special and anticorrosive properties to such surfaces, electrochemical composite coatings (ECCs) are essential. It is the dispersed phase that, being included in the metal matrix, gives the composite coatings a complex of new properties. This paper discusses how the aluminum/chromium oxide nanoparticles and high-dispersity graphite affect the physical and mechanical properties of coatings with a chrome matrix, i.e., corrosion resistance in 5 % NaCl, hardness, and wear resistance. Using the X-ray diffraction analysis, we have assessed how the particles under study affect the distribution of chromium over the surface of a steel sample. This paper also presents the microhardness test results for the heat treatment modes (temperature and time) of modified chrome coatings.