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钢铁在潮湿空气中易发生什么腐蚀

更新时间: 2020-10-28 00:00:00     

电化学腐蚀。电化学腐蚀是金属和电解质组成两个电极,组成腐蚀原电池。例如铁和氧气,因为铁的电极电位总比氧的电极电位低,所以铁是负极,遭到腐蚀。

电化学腐蚀的特征是在发生氧腐蚀的表面会形成许多直径不等的小鼓包,次层是黑色粉末状溃疡腐蚀坑陷。不纯的金属跟电解质溶液接触时,会发生原电池反应。

关键词: 钢铁 潮湿 空气 发生 什么 腐蚀

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