During the stamping process of components and parts of computer case,there is blackening phenomenon on the surface of galvanized fingerprint resistant plate of Baotou Steel so that the appearance quality after spraying by user is se-riously affected. The microscopic morphology of galvanized plate after stamping is analyzed by microscope and scanning e-lectron microscope ( SEM) aiming at the defect. The results showed that the passivation film on the surface of galvanized plate of Baotou Steel dropped out during stamping process as well as the exposed Zn oxidized and turned black. It is effec-tively solved by adjusting film thickness and proportion of poly tetra fluoro ethylene in passivating liquid.
关键词
镀锌耐指纹板/发黑现象/扫描电镜(SEM)
Key words
galvanized fingerprint resistant plate/blackening phenomenon/scanning electron microscope (SEM)
维普
万方数据