The properties and growth of anti-corrosion passive layers on an Al-Cu alloy in marine environments were studied using electrochemical techniques. It was found that the effect of dissolved oxygen is more significant than that of temperature. In deaerated seawater, an active-passive-breakdown transition with more anodic polarization, compared to localized corrosion which occurs in open circuit conditions in aerated seawater. The outer aluminum hydroxide layer formed in deaerated seawater was seen to decrease in corrosion protectiveness with increased temperature. It is perceived that increased diffusion of electroactive species with temperature enhances the breakdown of the outer aluminum hydroxide layer at higher temperatures, forming larger sized pores which to the inner aluminum oxide layer. The overall passive layer thickness was estimated to be between 3 to 9 nm using an established electrochemical model.

Properties And Performance Of Anti-Corrosion Passive Layers On An Al-Cu Alloy In Marine Environments

The AMPP SoCal Chapter is proud to host the much-anticipated AMPP Western Conference 2024 in San Diego, California. This year marks a groundbreaking return, and we are excited to welcome industry professionals, experts, and enthusiasts back!

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