Obtaining a positive microhardness gradient as a method of increasing the adhesion of electrolytic chromium coatings

Salakhova R.K., Tihobrazov A.B., Nazarkin R.M.
UDC
621.357.7
DOI
10.18577/2307-6046-2018-0-3-77-85
Article PDF (Russian) (717.47 KB)
How to cite
Salakhova R.K., Tihobrazov A.B., Nazarkin R.M. Obtaining a positive microhardness gradient as a method of increasing the adhesion of electrolytic chromium coatings // Proceedings of VIAM. 2018. No. 3. DOI: 10.18577/2307-6046-2018-0-3-77-85. URL: https://test.viam.ru/en/journal/2018/3/9
Keywords
chrome plating, adhesive strength, microhardness, gradient chromium coating, metallography, coating thickness, residual internal stresses.
Abstract

A method is proposed for obtaining thick chrome coatings in a self-regulating electrolyte with chromium plating with a positive microhardness gradient in thickness. The adhesion strength of the graded chromium coating was estimated by the temperature change method and the impact method on the vertical copra U-2M and metallographic studies of the individual layers of chromium deposited under various electrolysis regimes. The results of the investigation of residual macrostresses by x-ray diffractometric method  in chromium coatings of various microhardness are presented.

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