Corrosion and mechanical properties of nanostructure electrolytic Co-W and Fe-Co-W alloys

Abstract

It has been shown that the corrosion-electrochemical behavior of coatings with iron (cobalt) tungsten alloys depends on the content of the refractory component, and an increase in chemical resistance in the acidic medium is due to the formation of acidic tungsten oxides on the surface. The use of artificial neural networks allowed us to identify the most significant parameters that determine the corrosion resistance of alloys. The microhardness of the coatings under study depended on the content of tungsten and exceeds the characteristics of individual metals, which makes it possible to recommend such materials as an alternative to hard chromium coatings. An increase in corrosion resistance and microhardness of coatings by alloys is associated with the formation of a fine-crystalline and X-ray amorphous structure of the surface layers when using non-stationary modes of electrodeposition.