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Home > Technical support > ​电镀锌镍合金中锌和镍对钢铁都有防护作用

​电镀锌镍合金中锌和镍对钢铁都有防护作用

Release Date：2020-12-07 Content Comes From：http://jlwjdd.com/en/

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电镀锌镍合金：锌镍合金镀层的性质和用途。锌和镍对钢铁都有防护作用,在电镀锌镍合金锌的标准电极电位=-0.76V,比铁负,对钢铁起阳极保护作用.镍的标准电极电位=-0.25V,比铁正,因而对钢铁不能起阳极保护作用.锌镍合金镀层的电极电位为含镍量而变,通常使用的锌镍合金为含镍量7～18 %,得合金(这时镀层的耐蚀性最高),这种锌镍合金镀层对钢铁件来说,仍是阳极性镀层,它能起电化学保护作用.

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