Process optimization of electroless copper plating and its influence on electrochemical properties of AB₅-type hydrogen storage alloy

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• 作者：Bo ZHANG ; Wenyuan WU ; Shaohua YIN ; Shiwei LI ; Yao LUO ; Xue BIAN ; Ganfeng TU
• 关键词：hydrogen storage alloy ; electroless copper plating ; electrochemical performance ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：28
• 期：6
• 页码：922-926
• 全文大小：527 K

文摘

The amount of Cu coating by chemical plating was investigated based on quadratic regression orthogonal experimental design being adapted to the variation law of temperature, pH value and Ni²⁺ concentration, and the relevant regression equation was expressed as y=2.1609+0.5295×10⁻³T²-0.0342P²-0.0265N²+0.0023TP+0.0020TH+0.0199PN-0.0959T+0.3814P-0.2073N. The results showed that the deposition rate augmented with the increasing in temperature, pH value and Ni²⁺ concentration. The experimental parameters of the optimal coating were temperature 75 °C, pH value 8.5 and Ni²⁺ concentration 1.2 g/L. The electrochemical tests indicated that the cycle stability increased from 60.66 % to 75.58 % , indicating that the treated alloy exhibited better corrosion resistance.