Time-Dependent Corrosion Behavior of Aluminum Using Advanced Electrochemical and Characterization Techniques

The time-dependent corrosion behavior of pure aluminum (Al) in a chloride-containing environment was investigated using various electrochemical and characterization techniques for up to 336 h. Transmission electron microscopic secondary ion mass spectroscopic analysis revealed the continuous dissolution surface film over immersion time. In meantime, increasing passive oxide thickness resulted resistance enhancement time, as indicated by impedance analysis. noise measurements showed an increase kinetics with time until 60 h because accelerated localized early stage immersion. However, inhibition occurred after longer times due product deposition inside pit.