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    190303-磷化对热镀锌板电泳漆膜抗石击腐蚀性能的影响

       作者:黎敏,郝玉林,等    日期:2019-02-26     浏览:161    评论:0    
    提示:中文核心期刊,中国科技核心期刊!DOI: 10.19289/j.1004-227x.2019.03.003磷化对热镀锌板电泳漆膜抗石击腐蚀性能的影响黎敏*,郝
     

    中文核心期刊,中国科技核心期刊!   



    DOI: 10.19289/j.1004-227x.2019.03.003

    磷化对热镀锌板电泳漆膜抗石击腐蚀性能的影响

    黎敏*,郝玉林,赵晓非,苗雨芳(首钢技术研究院,?#26412;?100041)

    摘要:研究了热镀锌板磷化膜质量对其电泳膜抗石击腐蚀性能的影响。在满足车身涂装前处理要求的前提下,磷化膜晶粒尺寸和微孔电阻小有利于电泳膜厚的提高,磷化膜与电泳漆膜的结合力也较强。石击后循环腐蚀试验结果表明,热镀锌板上磷化膜的质量是影响电泳漆膜抗石击腐蚀的关键因素。磷化膜的晶粒尺寸越小,其电泳涂装后的抗石击腐蚀能力越强。

    关键词:热镀锌板;磷化膜;晶粒尺寸;电泳漆膜;石击;循环腐蚀;结合力

    中图分类号:TG178 

    文献标志码:A

    文章编号:1004 – 227X (2019) 03 – 0104 – 05

    Effect of phosphating on corrosion resistance of electrophoretic coating on hot-dip galvanized steel sheet after stone chipping // LI Min*, HAO Yu-lin, ZHAO Xiao-fei, MIAO Yu-fang

    Abstract: The effect of the quality of phosphating film on hot-dip galvanized steel sheet on the resistance of subsequent electrophoretic coating to stone chipping and corrosion was studied. On the premise of the qualification of pretreatment, the decrease in grain size and micropore resistance of phosphating film results in the increase of electrophoretic coating thickness and the enhancement of the adhesion between electrophoretic coating and phosphating film. The result of cyclic corrosion test after stone chipping results showed that the quality of phosphating film on hot-dip galvanized steel sheet is the key factor affecting the corrosion resistance of the electrophoretic coating suffered from chipping. The smaller the grain size of phosphating film is, the stronger the chipping corrosion resistance of electrophoretic coating is.

    Keywords: hot-dip galvanized steel sheet; phosphating film; grain size; electrophoretic coating; stone chipping; cyclic corrosion; adhesion

    First-author’s address: Research Institute of Technology of Shougang Group Co., Ltd., Beijing 100041, China

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