摘要
采用化学浸渍法在Cu-6Zn合金表面分别制备了4种钝化膜——未加稀土盐(1号)、单一Ce盐(2号)、单一La盐(3号)和混合(Ce+La)盐(4号)钝化膜。对比分析了4种钝化膜厚度及其耐蚀性,并探讨了钝化膜的成膜机理。结果表明:4种钝化膜厚度从高至低顺序为:4号>3号>2号>1号;混合(Ce+La)盐(4号)转化膜的物相主要为CuZn、Cu_(2)O、CeO_(2)、La(OH)_(3)和Ce(OH)4;4种钝化膜试样及裸钢试样的耐蚀性从高至低顺序为:4号>3号>2号>1号>裸样,混合(Ce+La)盐钝化膜可以对Cu-6Zn合金起到很好的保护作用,具有最佳的耐蚀性。
Four kinds of passivation films were prepared on the surface of Cu-6 Zn alloy by chemical dipping method——no rare earth salt(No.1),single Ce salt(No.2),single La salt(No.3)and mixed(Ce+La)salt(No.4)passivation films.The thickness of the four passivation films and their corrosion resistance were compared and analyzed,and the film forming mechanism was discussed.The results showed that the order of the thickness of the four passivation films from high to low was:No.4>No.3>No.2>No.1;and the phases of No.4 film were mainly CuZn,Cu_(2)O,CeO_(2),La(OH)_(3)and Ce(OH)4.The corrosion resistance of the four passivation film samples and bare steel sample in descending order was:No.4>No.3>No.2>No.1>bare sample.The mixed(Ce+La)salt passivation film could play a very good protective effect on the Cu-6 Zn alloy and had the best corrosion resistance.
作者
邹燕
曹大富
甘树昆
周明德
ZOU Yan;CAO Dafu;GAN Shukun;ZHOU Mingde(Yangzhou Polytechnic College,Yangzhou 225127,China;Yangzhou University,Yangzhou 225100,China;Jilin Institute of Chemical Engineering,Jilin 132022,China)
出处
《腐蚀与防护》
CAS
北大核心
2021年第1期13-16,21,共5页
Corrosion & Protection
基金
江苏省高校自然科学基金(16KJB560024)。
关键词
Cu-6Zn合金
钝化膜
膜厚
耐蚀性
Cu-6Zn alloy
passive film
film thickness
corrosion resistance
