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稀土Ce4+对镍铜磷化学镀层性能的影响

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Indexed by:期刊论文

Date of Publication:2012-12-15

Journal:材料保护

Included Journals:PKU、ISTIC、CSCD

Volume:45

Issue:12

Page Number:4-6

ISSN No.:1001-1560

Key Words:化学镀Ni—Cu-P;稀土Ce4+;镀层;耐蚀性;形貌;成分

Abstract:稀土可有效改善化学镀Ni-Cu-P层的硬度、耐蚀性能,目前,对此研究还不够深入。在Ni—Cu-P化学镀液中引入不同含量的Ce4+,采用金相显微镜和电子能谱分析了所得Ni—Cu-P镀层的表面形貌和成分,利用极化曲线和交流阻抗谱考察了Ce4+对Ni-Cu-P镀层在室温海水中的耐蚀性能的影响。结果表明,加入Ce4+能减少Ni—Cu-P镀层的缺陷,使晶粒细化,镀层表面平整;镀层中不合Ce,Ce4+促进了镀层的非晶态化程度,从而提高了其耐蚀性;镀层的自腐蚀电位比紫铜基材的低,自腐蚀电流密度远小于紫铜基材,添加Ce4+能提高Ni-Cu-P镀层的耐蚀性,其自腐蚀电流密度低于未加稀土所得的镀层。

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