不同光整工艺对全无铬钝化热镀锌板耐蚀性的影响  

Effects of different finishing processes on corrosion resistance of hot-dip zinc-coated steel sheet after chromium-free passivation

作　　者：王姗姗 李浩源 刘永壮 黎敏 杨志强 鞠新华 WANG Shanshan;LI Haoyuan;LIU Yongzhuang;LI Min;YANG Zhiqiang;JU Xinhua(Technology Research Institute of Shougang Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043

出　　处：《电镀与涂饰》2023年第11期67-73,共7页Electroplating & Finishing

摘　　要：分别采用普通磨辊和超精细磨辊对热镀锌板进行光整处理得到不同微观形貌的表面,再进行全无铬钝化处理。对比了采用不同光整工艺时所得全无铬钝化膜的表面形貌和元素分布。通过电化学测试和循环盐雾试验探究了采用不同光整工艺时镀锌板表面无铬钝化膜的耐腐蚀性能。结果表明,超精细磨辊处理后全无铬钝化热镀锌板表面更平坦,钝化膜覆盖更均匀,表面活性位点少,耐腐蚀性能更好。The hot-dip zinc-coated steel sheets were finished with common roller or ultrafine roller to fabricate different microscopic morphologies on their surfaces initially,and then treated by chromium-free passivation.The surface morphology and element distribution of the chromium-free passivation films on hot-dip zinc-coated steel sheets finished with different rollers were compared,and their corrosion resistance was studied by electrochemical measurement and cyclic salt spray test.The results showed that the hot-dip zinc-coated steel sheet finished with ultrafine roller was smoother and covered with a more uniform passivation film,and had better corrosion resistance for there were less active sites on its surface.

关 键 词：热镀锌板 全无铬钝化 光整 组织结构 耐蚀性 

分 类 号：TQ153.15[化学工程—电化学工业] TQ153.6