MODELING THE CORROSIVE EFFECTS OF VARIOUS MAGNESIUM ALLOYS EXPOSED TO TWO SALTWATER ENVIRONMENTS

摘要

Four magnesium alloys in two forms, as-cast AE44, as-cast AM60, extruded AZ61, and extruded AZ31 were examined in two corrosive environments, immersion and salt spray. General corrosion characteristics, weight loss and thickness loss, as well as surface characteristics, pit number density, pit area, nearest neighbor distance, and ICAF, were quantified over 60 hours. The most heavily corroded magnesium alloy, determined by combining general and pitting corrosion, was AZ61, followed by AE44, AZ31, and AM60, respectively. When comparing environments, more pits formed on all surfaces exposed to the immersion environment, while the pits were larger on the salt spray environments.