Effect of some Microstructural Parameters on the Corrosion Resistance of Magnesium Alloys

The influence of the ß-Mgi7Ali2 phase and, to a lesser degree, the solute content in the a-Mg matrix on the corrosion resistance of Mg alloys was investigated by cyclic potentiodynamic polarization and potentiostatic polarization tests using AZ31B, AM30 and AM60B in contact with a mildly aggressive near-neutral saline solution. Results showed that all three Mg alloys corrode in a partially protective state under open circuit conditions in the …