材料期刊网

用SEM、EDX、XRD、XPS等技术分析了电镀锌层表面黑变膜的组成和结构．结果表明，黑变膜是锌的腐蚀作用及杂质Pb去极化作用的共同产物．它由及微量PbO组成，膜表层Zn是以ZnO形态存在，而膜内层则以非化学计量化合物形态存在．并发现黑变膜是一种锌受腐蚀所形成的表面膜上产生的光干涉现象．

The composition and structure of black tamished film on zinc plated surface were investigated by means of SEM, EDX, XRD and XPS. It was found that black tamished film is a corrosion products formed on zinc plated surface, and impurity Pb accelerates electrochemical corrosion process of zinc by depolarization.This film possibly composed of and trace PbO. The results of XPS analyses showed that Zn exists as stoichimetric compound ZnO in the surface layer of the film, while as non-stoichimetric compound in the inner layer of the film. It was also found that the color of black tarnished film was induced by light interference effect to the film.