模具锌合金表面化学镀镍前处理工艺

腐蚀科学与防护技术, 2010, 22(3): 220-223.

模具锌合金表面化学镀镍前处理工艺

1.1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州 7300502. 兰州理工大学有色金属合金及加工教育部重点实验室,兰州 730050>

1.1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials,Lanzhou University of Technology,Lanzhou 7300502. Key Laboratory of Nonferrous Metal Alloys and Processing of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050>

基金项目: 甘肃省自然科学基金项目（2007GS04799）资助

关键词：锌合金 , electroless nickel plating , pretreatment , process

Pretreatment Process of Die Zinc Alloy for Electroless Nickel Plating

ZHAN Wen-hua , LIU Hong-jun , CAO Chi , LI Ya-min

Keywords： zinc alloy , 化学镀镍 , 前处理 , 工艺

采用两种不同化学除油溶液和浸蚀活化溶液以及一种碱性预镀镍工艺作为模具锌合金化学镀镍的前处理工艺,并研究了工艺与性能的关系,结果表明,化学除油溶液应为弱碱性,浸蚀活化工艺采用稀酸+有机酸溶液较为合适,预化学镀镍最佳时间为30分钟.经实验确定的前处理工艺的模具锌合金试样在化学镀镍后镀层均匀、致密,且结合良好.

Because of particular chemical activity of zinc alloy,the pretreatment process is the key in the course of electroless nickel plating.Two chemical oil removal solutions,two activating methods and alkaline prenickel plating method were comparatively examined as pretreatment techniques of die zinc alloy for electroless nickel plating.The results showed that chemical oil removal solution should be alkalescent,diluted acid and organic acid solution is suitable as etchingactivation process,the optimal time is 30min for prenickel plating.The Ni-P coating obtained after pretreatment process had the best quality with uniform coating and good adhesion.

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