COMPARATIVE CORROSION RESISTANCE TESTS OF NICKEL AND ZINK POWDER COATINGS APPLIED BY COLD GAS DYNAMIC SPRAYING

The study conducted comparative tests of coatings deposited on St3sp steel plates using Cold Gas Dynamic Spraying (CGDS) method. The experiments were carried out using a «Dimet — 405» system. Ready-made powder mixtures were chosen as the material for spraying: nickel N3−00−02 and zinc Z-00−11. After deposition, the samples were subjected to mechanical and corrosion tests. As a result of visual inspection, metallographic examination, analysis of corrosion rates and mechanical tests, zinc-based coatings demonstrated superior to nickel-based coatings corrosion properties, while nickel-based coatings have shown higher resistance to cracking during bending.