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为了研究不同时效工艺对真空压铸 ＡＭ５０镁合金耐蚀性的影响，通过静态失重实验和电化学实验研究了 Ｔ６处理后 ＡＭ５０镁合金在 ＮａＣｌ溶液中的腐蚀行为．结果表明，合金经过 １７０和２３０℃时效处理后腐蚀速率的变化情况基本类似，均为先降低后升高，最后达到一个稳定值．但经过 ２３０℃时效处理后合金的耐蚀性远差于经过 １７０℃时效处理后的情况，且达到腐蚀速率最低点所需时间更长．不同时效处理后的合金具有相似的电化学腐蚀行为，自腐蚀电位无明显变化规律，而腐蚀电流密度与腐蚀速率的变化趋势近乎一致．腐蚀速率随腐蚀时间的延长而下降，并最终保持一个较为稳定的数值．此外，合金腐蚀速率的理论值和实测值相吻合．
In order to study the effect of different aging processes on the corrosion resistance of vacuum-cast AM50 magnesium alloy, the corrosion behavior of AM50 magnesium alloy in NaCl solution after T6 treatment was studied by static weight loss experiment and electrochemical experiment. The results show that the corrosion rate of the alloy after aging treatment at 170 and 230 ℃ is almost the same, both decrease and then increase, and finally reach a stable value. However, after aging at 230 ℃, the corrosion resistance of the alloy is far worse than that after 170 ℃ aging, and it takes longer to reach the lowest corrosion rate. The alloys with different aging treatments have similar electrochemical corrosion behavior with no significant change in self-corrosion potential, while the corrosion current density and corrosion rate are nearly the same. The corrosion rate decreases with increasing corrosion time, and eventually maintains a more stable value. In addition, the theoretical value of alloy corrosion rate and measured values match.