无电镀镍复合镀层耐蚀性质研究

电化学（中英文） ›› 2001, Vol. 7 ›› Issue (2): 203-209.

无电镀镍复合镀层耐蚀性质研究

杨聪仁,周孟锋,谢淑惠

逢甲大学材料科学系!台湾台中,逢甲大学材料科学系!台湾台中,虎尾技术学院材料科学及工程学系!台湾云林

收稿日期:2001-05-28 修回日期:2001-05-28 出版日期:2001-05-28 发布日期:2001-05-28

Study on Corrosion Resistance of Electroless Nickel Composite Coatings

YANG Tsong_jen *, JOU Meng_feng

(Dept. of Materials Science, Feng Chia Univ, Taichung) Hsieh Sue_hwei ( Dept.of Materials Sci.and Engin,Hu Wei Inst.of Tech,Yuenlin

Received:2001-05-28 Revised:2001-05-28 Published:2001-05-28 Online:2001-05-28

摘要/Abstract

摘要： 研究无电镀镍镀层加入钻石微粒或PTFE微粒的均匀分散相 ,所得之复合镀层在 3.5%NaCl水溶液中的电化学分析 ,浸渍试验与临雾试验 ,皆显示复合镀层之耐蚀性低于不含微粒之无电镀镍镀层 .由SEM ,AES ,XRD ,EPMA分析镀层微观组成 ,复合镀层之磷含量分布呈差异性变化 ,磷量较多区域为微阴极 ,磷量较少区域为微阳极 ,复合镀层存在众多微电池组合 ,容易引起电化学伽凡尼腐蚀 ,造成复合镀层耐蚀性降低 ,当镀层微粒含量增加时 ,微粒的惰性保护效果超过微电池效应 ,复合镀层的耐蚀性质才能提高

关键词: 无电镀镍复合镀层, 钻石微粒, PTFE

Abstract: The eletroless nickel composite coating was prepared by uniform dispersion of diamond (or PTFE) particles throughout electroless nickel deposition. Corrosion resistance of composite coating in 3.5% NaCl aqueous solution was investigated by electrochemical analysis, dipping test and salt spray test. The results showed that the corrosion resistance of composite coating was inferior to that of electroless nickel coating if small amount of particles was added to the composite coating. Microsturctural analysis by SEM,AES,XRD,and EPMA indicated that the distribution of phosphorus is not homogeneous in the composite coating. The phosphorus_rich region acts as microcathode, however, the phosphorus_lean region acts as microanode.The decrease in corrosion resisthnce may result from the presence of numerous microcells presented in the composite coating.Only when enough amount of particles is included in the composite coating,the protective effect due to inertness of particl is observed.

Key words: Electroless composite coating, Diamond, PTFE, Corrosion resistance

中图分类号:

TG174.44

杨聪仁,周孟锋,谢淑惠. 无电镀镍复合镀层耐蚀性质研究[J]. 电化学（中英文）, 2001, 7(2): 203-209.

YANG Tsong_jen *, JOU Meng_feng . Study on Corrosion Resistance of Electroless Nickel Composite Coatings[J]. Journal of Electrochemistry, 2001, 7(2): 203-209.

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