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通过动电位极化曲线和静态失重法研究了ZK60镁合金在3.5%卤化钠Na X(X=F,Cl,Br和I)溶液中的腐蚀行为,并且利用SEM观察了ZK60镁合金的腐蚀形貌。结果表明:ZK60镁合金在3.5%Na X溶液中的开路电位先上升然后逐渐趋于平缓,最后达到一个较稳定的值。ZK60镁合金的电化学行为与溶液中卤素离子的种类有关,在3.5%Na F溶液中处于钝化状态,而在3.5%Na Cl,3.5%Na Br和3.5%Na I溶液中则处于腐蚀状态且腐蚀速率随浸泡时间的延长而减小,其主要原因是溶液p H值的升高和腐蚀产物所起的保护作用。
The corrosion behavior of ZK60 magnesium alloy in 3.5% sodium halide Na X (X = F, Cl, Br and I) solution was investigated by potentiodynamic polarization curve and static weight loss method. The corrosion behavior of ZK60 magnesium alloy was observed by SEM. appearance. The results show that the open circuit potential of ZK60 magnesium alloy first increases in 3.5% Na X solution and then gradually flattens, finally reaching a more stable value. The electrochemical behavior of ZK60 magnesium alloy is related to the type of halogen ions in solution, passivated in 3.5% NaF solution, and corroded in 3.5% NaCl, 3.5% NaBr and 3.5% NaI solution The corrosion rate decreases with the soaking time, mainly due to the increase of p H value and the protective effect of corrosion products.