【摘要】 应用ＳＥＭ、ＥＤＸ和ＸＰＳ分析手段研究了涂油钝化电镀锌钢板表面黑变膜的外观、形貌、组成与结构，并对黑变的形成进行了讨论。结果表明，黑变膜厚度约１００ｍｍ，它是ＺｎＯ１－ｘ为主，并由ＺｎＯ、Ｚｎ（ＯＨ）２、Ｃｒ２Ｏ３、ＣｒＯＯＨ、ＳｉＯ２及微量ＣｒＯ３等物质组成，但膜表层Ｚｎ是以ＺｎＯ形态存在，膜内层则以非化学计量化合物ＺｎＯ１－ｘ形态存在。黑变是镀锌层膜下腐蚀与光的干涉作用所致。更多还原

【Abstract】 The appearance, morphology, composition and structure of black tarnished film on CrO3-SiO2 pas- sivated electrogalvanized steel sheet were investigated by SEM, EDX and XPS. It was shown that the black tarnished film was composed of ZnO1-8, ZnO, Zn(OH)2, Cr2O3, CrOOH, SiO2 and trace CrO3. Zinc existed as ZnO in the surface layer and as non-stoichimetric compound ZnO1-x in the inner layer of the black tarnished film. The formation mechanism of black tarnished film was discussed comprehensively.更多还原