METHOD FOR EVALUATING CORROSION RESISTANCE OF MAGNESIUM ALLOY MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for evaluating a corrosion resistance of a magnesium alloy material, capable of evaluating the corrosion resistance of the magnesium alloy material in a short time. SOLUTION: The method includes the steps of: giving a corrosion progression treatment such as salt spray and saltwater immersion to the magnesium alloy material; measuring a corrosion reaction resistance by the AC impedance method for the magnesium alloy material; and evaluating the corrosion resistance by comparing this measured value and a corrosion reaction resistance value (initial value) of the magnesium alloy material prior to the treatment. If the measured value is more than twice higher than the initial value when a corrosion progression treatment time is 10 minutes or less, the magnesium alloy material can be evaluated highly corrosion resistant. Thus, the corrosion resistance of the magnesium alloy material can be quantitatively evaluated in a very short time of about 10 minutes. COPYRIGHT: (C)2011,JPO&INPIT