摘要
研究了电镀锌钢板CrO3-H3PO4－SiO2体系纯化膜的成分与结构，并对钝化膜的耐蚀性及其原因进行了探讨．结果表明，该钝化膜是1种由CrO3，Cr（OH）3，CrOOH，ZnCrO4，ZnSiO3Zn3（PO4）2，CrPO4和SiO2等化合物组成的、具有凝胶网络状结构的厚型复合转化膜.这种膜具有良好的屏蔽效应和缓蚀作用，能明显地改善镀锌钢板抗白锈的能力．它的耐蚀性是CrO3－SiO2体系钝化膜的3倍．
The composition and structure of passive film formed from CrO3-H3PO4SiO2, systems on galvanized steel sheet were inveshgated, the corrosion resistance and itsprotective causes of the film were also discussed. The experimental results showed thatthe film is a thick type of complex conversion coating with gelatinous net structurecontaining Cro3, Cr(OH)3, CrOOH, ZnCrO4, ZnSiO3,, Zn3(PO3)2, CrPO4 and SiO2, etC. Thewhite rust-resisting property of the film is of three times better than that of filmformed from CrO3, - SiO2, systems because of good shielding and inhibihng.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1997年第4期355-359,共5页
Journal of University of Science and Technology Beijing
基金
国家"九五"重点科技攻关课题
关键词
铬酸盐
腐蚀
纯化膜
钢板
镀锌
电镀
galvanized steel sheet,chromate,conversion coating,corrosion
