Investigation on Electrochemical Cathodic Protection for Cavitation-Erosion Reduction of Anodized Al Alloy.

This study investigated the damage prevention potential range of anodized 5083-H321 aluminum alloy under a cavitation-erosion environment in seawater. Various applied potential conditions were determined through the cathodic polarization experiment. Then cavitation-erosion experiments were conducted with the applied potentials and the current density, weight loss, and surface damage depth were analyzed. The results presented excellent cavitation-erosion resistance in the concentration polarization section (-1.0~-0.8 V).