Effect of Pretreatment on Electroless Ni-P Plating Quality of Magnesium Alloy
摘 要
采用扫描电镜和性能检测的方法,分析了表调、活化和浸锌等前处理工艺对镁合金化学镀Ni-P质量的影响.结果表明,表调可使晶界凸出于α-Mg基体,降低镁合金的表面粗糙度,提高化学镀层的结合强度.活化及浸锌后,促进了化学镀的进行.按表调、活化、一次浸锌、退镀、二次浸锌的工艺进行前处理后实施化学镀,得到的Ni-P镀层致密、平整,与基体结合力强,有效提高了镁合金表面耐蚀性及显微硬度.
Abstract
The effects of pretreatment including surface conditioning and activation and zinc dipping on the electroless Ni-P plating quality of AZ31 magnesium alloy were investigated by microstructure analysis and property test.The surface conditioning could improve the bond strength between electroless Ni-P plating and magnesium matrix,resulted from the projection of grain boundaries and the decrease of surface roughness of magnesium matrix.The electroless Ni-P plating of AZ31 magnesium alloy was promoted owing to the formation of crystal nucleus of elemental zinc through zinc dipping for Ni-P coating.The Ni-P coating was even,dense and had good bond strength when the pretreatment including surface conditioning,activation,zinc dipping,deplating and twi-zinc dipping was adopted before electroless Ni-P plainting.The corrosion resistance and micro hardness of AZ31 magnesium alloy were improved by electroless Ni-P plating.
中图分类号 TG174.44
所属栏目 应用技术
基金项目 中国博士后基金项目(20070410875);郑州市科技攻关项目(063SGZG23104)
收稿日期 2008/1/29
修改稿日期 2008/3/16
网络出版日期
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引用该论文: LIU Sheng-xin,CHEN Yong,HAO Dan-shu,LU Xiao-jian,GUAN Shao-kang. Effect of Pretreatment on Electroless Ni-P Plating Quality of Magnesium Alloy[J]. Corrosion & Protection, 2008, 29(9): 547~549
被引情况:
【1】沟引宁,张黎明, "前处理工艺对AZ31镁合金浸锌层性能的影响",腐蚀与防护 33, 699-701(2012)
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参考文献
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