摘要
镀锌层无铬钼酸盐钝化液的研究进程经历了由钼酸盐+磷酸盐体系发展到该体系加添加剂(无机或有机化合物)的钝化液体系的过程。为了增加钝化膜的膜厚,封闭微裂纹,达到高耐蚀的目的,列举了将无机盐和有机化合物复配以获得复合钝化膜的钝化工艺。其中较为成功的钝化液是钼酸盐与硅烷的复配体系,所获得的钝化膜的性能已接近、达到或超过了铬酸盐钝化膜的耐蚀水平。最后提出了一些尚待解决的问题。
The passivation technologies for preparing composite pas-sivation films on electroplated Zn and Zn alloy coatings from Cr-free molybdate solution containing formulated inorganic salts and organic compounds were introduced in relation to increasing thickness of the passivation film,sealing micro-cracks and impro-ving corrosion resistance of the film. It was pointed out in the his-tory of study on Cr-free molybdate passivation solution,a transi-tion from molybdate plus phosphate systems to the same systems doped with inorganic and/or organic additives had been involved. One of the most successful passivation solution was molybdate-si-lane combinatory system,which could be used to prepare passiva-tion films with nearly the same,comparable or better corrosion re-sistance as compared with chromate passivation film. Finally,some problems along with Cr-free passivation solution for electro-plated Zn and Zn alloy coatings were suggested.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第4期46-47,79,共3页
Materials Protection
关键词
无铬钝化
钼酸盐
磷酸盐
硅烷
复合膜
镀锌层
Cr-free passivation
molybdate
phosphate
silane
composite films
electroplated Zn coating
