The Influence and Mechanism of Corrosion on AZ31B Magnesium Alloy in 1,2-propanediol Engine Coolant

摘要

Corrosion mechanism of AZ31B magnesium alloys in 1,2-propanediol coolant has been studied usingpolarization curves, EIS, SEM and SEM- EDS. Magnesium alloy can be formed a stable and tightprotective film in foundation liquid, which can easily be destroyed in the simulation solution. Littlechange in temperature on magnesium alloy reaction mechanism. But serious hydrogen evolutionreaction occurs at high temperament on magnesium alloy surface in basis solution.