电沉积镀镍层的无铬钝化工艺  

Chromate-free Passivation Technology for Electrodeposited Nickel Coating

作　　者：堵艳艳[1,2] 潘勇[1,2] 周兆锋[1,2] 李玮[1,2] 惠建科[1,2] 

机构地区：[1]湘潭大学材料与光电物理学院,湘潭4111051 [2]湘潭大学低维材料及其应用技术教育部重点实验室,湘潭411105

出　　处：《腐蚀与防护》2012年第1期60-63,共4页Corrosion & Protection

基　　金：国家自然科学基金(No.11002121);湖南省科技重大专项(No.2009FJ1002)

摘　　要：采用正交试验法筛选了一种以植酸、钼酸钠和缓蚀添加剂为基本组成的无铬钝化液。通过电化学阻抗谱测试,确定了最佳成膜时间;通过5%CuSO4点滴试验、10%NaCl浸泡试验和极化曲线测试,对电沉积镀镍层无铬钝化后的耐蚀性能进行了研究。结果表明,采用本无铬钝化工艺后,镀镍层耐蚀性能良好。In order to improve the corrosion resistance of electrodeposited nickel coating and subsititute the carcinogenic hexavalent chromium passivation, a new chromate free passivation solution was screened out by means of orthogonal analysis experiments. Fhe solution was composed of phytic acid, sodium molybdate and corrosion inhibitor. The optimal time for conversion film formation was determined by electrochemical impedance spectroscopy. The corrosion resistant properties of electrodeposited nickel coating were studied by dropping corrosion test in 5% CuSO4, immersion test in 10% NaC1 and polarization curves. The results showed that the film passivated by the technology has good anti-corrosion performance.

关 键 词：镀镍层 耐腐蚀 无铬钝化 

分 类 号：TG178[金属学及工艺—金属表面处理]