【摘要】 通过实验方法分析汽车板涂装后漆膜产生点蚀的原因。利用S-3400N扫描电子显微镜(SEM)观察腐蚀产物微观形貌,辅以能谱(EDS)分析点蚀部位元素分布和含量。结果表明,冷轧汽车板表面夹杂物降低了其表面磷化膜的覆盖性、均匀性,易使涂装后的漆膜发生点蚀。通过控制铸坯机清深度可有效改善冷轧板表面状态,降低基板表面夹杂物数量。更多还原

【Abstract】 The reason for dot corrosion(DC) of the paint film on auto sheet after painting was researched in labrotary. The microstructure and the chemistcal component of the corrosion products were analyzed by S-3400 N type of SEM and EDS.The results show the inclusion in auto sheet surface makes the coverage and uniformity of paint film reduce, leading to the dot corrosion of paint film. One of the solving way is to control the mould caster to decrease the inclusiong quantity and increase the quality of surface cold rolling sheet.更多还原