COMPARATIVE CORROSION RESISTANCE TESTS OF COPPER AND ALUMINUM POWDER COATINGS APPLIED BY COLD GAS DYNAMIC SPRAYING

Metallurgy and Materials
Authors:
BLINOV S.A. LEVITSKY A.M. Zotov O. G. GOLUBKOV N.A.
Abstract:

The study conducted comparative tests of coatings deposited on St3sp steel using Cold Gas Dynamic Spraying (CGDS) method. The experiments were carried out using a «Dimet-405» system. Ready-made powder mixtures from «Dimet» were chosen as the material for spraying: copper C-01−01 and aluminum with the addition of zinc A-80−13. After deposition, the samples were subjected to mechanical and corrosion tests in a salt spray chamber and in containers with seawater. The corrosion resistance of the coatings was assessed by measuring the change in the weight of the samples, which also allowed for the calculation of the corrosion rate. The results were confirmed by metallographic analysis and visual inspection. The coating made of a mixture of aluminum and zinc demonstrated the highest corrosion resistance. No oxidation of the base metal of the sample was observed. The resistance to cracking during bending was also higher for aluminum-zinc based coatings.