摘要
为探究底漆正常涂覆、面漆漏涂的镀铝锌彩涂板表面缺陷产生的原因,采用镀层截面金相分析、扫描电镜、电子探针观察以及能谱分析等手段进行了检测分析。结合实际生产状况初步认为,预清洗不完全、基板表面残留氧化铁是造成漏涂的根本原因。氧化铁的存在使得镀层不连续,出现悬崖和缺失,在凹陷处残留有气体,涂漆后烘干时受热膨胀,冲破面漆,从而成为漏涂缺陷。
Surface holiday is one of the typical defects of color-coated galvanized steel sheet.Thus the causes leading to the holiday defects in the surface varnish of the color-coated galvanized steel sheet with well painted bottom varnish were investigated by means of sectional metallographic analysis,energy dispersive spectroscopic analysis,scanning electron microscopic observation,and electron probe microanalysis,in connection with consideration of the actual production conditions.It was primarily found that the inadequate pre-cleaning and Fe3O4 residue could mainly account for the surface holiday defects of the surface varnish of the steel sheet.In particular,Fe3O4 caused discontinuousness of the varnish,leaving absence of varnish at some locations,while the residue gas entrapped in the concave zones would expand and break through the surface of the vanish in post-painting heating.
出处
《材料保护》
CAS
CSCD
北大核心
2007年第4期47-49,共3页
Materials Protection
关键词
热浸镀
彩涂板
漏涂
带钢
铝锌涂层
hot-dip galvanizing
color-coated steel sheet
holiday defect
ribbon steel
aluminizing and galvanizing coating
