Corrosion resistance of electrodeposited RE-Ni-W-P-SiC composite coating

摘要

Immersion experiment results show that corrosion rate of the ass-deposited RE-Ni-W-P-SiC composite coating in HCl solutions increases with the rise of HCl concentration. On the contrary, The corrosion rates of the composite coatings after heat treatment decreases with increasing HCl concentration. The corrosion rates of the composite coatings in as- deposited state and after heat treatment in H_2SO_4 and H_3PO_4 solutions respectively decrease with the rise of H_2SO_4 and H_3PO_4 concentrations.