微量元素对高速电镀锌-镍合金的影响

Influences of Trace Elements on High Speed Zn-Ni Alloy Electroplating

摘要: 研究了微量元素Cu、Fe、Cr对高速电镀zn-Ni合金的影响并探讨了其作用机理。Cu²⁺在Zn-Ni镀液中容易析出,但它是一种有害元素;Fe²⁺、Cr³⁺则难于析出,镀层中含适量的Fe、Cr可提高Zn-Ni镀层耐蚀性。同时还探讨了微量元素电沉积机理,提出了微量元素从Zn-Ni镀液中电沉积进入镀层的定量判定方法。

Abstract: The influences of trace elements Cu,Fe,Cr on high speed Zn-Ni alloy electroplating and their mechanism have been investigated.The Cu²⁺ in Zn-Ni electrolyte can easily deposit,but it is a harmful element;while Fe²⁺ and Cr³⁺ are difficult to deposit.The Fe and Cr in deposit can increase the corrosion resistance of Zn-Ni deposit.The electrodepositing mechanism of trace elements has been discussed,and the quantitative predication method for wheather trace element can deposit from electrolyte has been established.