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点蚀有何特点?

问答题
2021-12-28 02:14
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正确答案

①点蚀多发生在表面生成钝化膜的金属表面如不锈钢、铝等或表面有阴极性镀层的金属如碳钢表面镀镍等。
②点蚀发生在有特殊离子的介质中如氯离子。
③点蚀要发生在某一临界电位之上此电位称为点蚀电位。


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