Perforation of Coated Steel Panels on Automobiles and its Corrosion Mechanism
Perforation of Coated Steel Panels on Automobiles and its Corrosion Mechanism
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汽车涂层钢板穿孔及其腐蚀机理
DOI：
10.3323/jcorr1991.50.115
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Kajiyama
中科院分区：
文献类型：
--
作者：
S. Fujita;H. Kajiyama
研究了镀锌防腐钢板和富锌底漆涂层钢板对实际汽车穿孔腐蚀的影响及其腐蚀机理。车门折边内侧的富锌底漆涂层钢板在6-7年内发生穿孔，搭接侧梁中镀锌层质量为120 g/m2的镀锌钢板在14年以上后发生穿孔。通过对北美汽车车身镀锌钢板穿孔深度的测定和锈蚀分析，将镀锌钢板穿孔腐蚀分为4个过程。锌腐蚀控制钢基体腐蚀的时期在决定道路盐渍区穿孔发生的时期中起着非常重要的作用。
The effect of galvanized corrosion steel sheets and zinc-rich primer coated steel sheets on the perforation corrosion of actual automobiles and the relevant corrosion mechanism was studied. Perforation occurred in 6-7 years for zinc-rich primer coated steel panels inside of door hems and after more than 14 years for galvanized steel sheets with 120g/m2 zinc coating mass in the lapped side-sill. Perforation corrosion of galvanized steel panels can be divided into 4 corrosion processes on the basis of measured perforation depth and analysis of iron rust for North American automobile bodies. The period in which zinc corrosion controls the corrosion of the steel substrate played a very important role in determining the period until perforation occurs in road salting regions.