下列关于铁析氢腐蚀的说法正确的是(    ) A.铁为正极      

下列关于铁析氢腐蚀的说法正确的是(    )

A.铁为正极                        B.炭为正极

C.溶液中氢离子浓度不变            D.此腐蚀在任何溶液中都发生

答案

B


解析:

析氢腐蚀在较强的酸性条件下发生的,被腐蚀的金属铁是负极,其中含的炭为正极,在正极上溶液中氢离子得电子被还原产生氢气。

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