Effect of electrochemical potential on the corrosive wear behavior of 5052 aluminum alloy in 0.5 M NaCl solution

Abstract

A study has been carried out to investigate the corrosive wear behavior of aluminum alloy 5052 (AA5052) under reciprocated sliding in 0.5 M sodium chloride solution by a ball‐on‐disc tribometer which is associated with a potentiostat. It is clearly observed that applied potential has significant effects on the tribological and electrochemical performance of AA5052 in testing solution. The friction coefficient decreases with the increasing potential from the cathodic domain to the anodic one. The total wear volume of AA5052 increases with the increasing potential. The synergistic effort of wear and corrosion to the friction and wear performance is discussed.

Influences of electrolytes on tribocorrosion performance of MAO coating on AZ31B magnesium alloy in simulated body fluid

“…Once sliding starts, it is easy to observe that all samples show a drastic decrease in OCP. This is due to the mechanical damage on top layer at initial impact of upper alumina ball, resulting in electrochemical active areas in wear scar 41 . However, the largest decrease in OCP during testing is detected for uncoated sample, indicating the complete removal of oxide film and exposing the bare Mg alloy surface to the electrolyte 42 .…”