【作者】 杨栋； 陈建设； 韩庆； 刘奎仁； 冯乃祥；

【Author】 YANG Dong,CHEN Jian-she,HAN Qing,LIU Kui-ren,FENG Nai-xiang (School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China)

【机构】 东北大学材料与冶金学院；

【摘要】 利用热镀方法在钢丝表面上制备了添加不同含量La元素(0,0.02,0.05,0.1和0.2wt.%)的Zn-55Al-1.6Si-xLa合金镀层。利用铜加速乙酸盐雾(CASS)实验、液态浸渍实验考察了各镀层的腐蚀失重量,采用弱极化曲线及EIS测试着重考察了添加不同含量La元素对galvalume镀层电化学腐蚀行为的影响。结果表明:添加适量的La元素可有效地提高galvalume镀层的耐蚀性能,各镀层的腐蚀过程受阴极反应过程控制。Zn55Al1.6Si0.05La镀层以其最小的腐蚀失重量,Icorr和Cc,以及最大的Rc,表明其耐蚀性能最好。更多还原

【Abstract】 Hot-dip Zn-55Al-1.6Si-xLa alloy coatings on steel wire containing 0,0.02,0.05,0.1 and 0.2 wt.% La were prepared. The corrosion loss of Zn-Al-Si-La alloy coatings were investigated by CASS test, immersion test in 3.5% NaCl solution, moreover ,effects of Lanthanum addition on electrochemical corrosion behavior of hot-dip galvalume coating were mainly studied by weak polarization curves and EIS tests. It was shown that the corrosion resistance of Zn55Al1.6Si coating could be improved by adding the proper amounts of La, the corrosion process of each coating was controlled by cathodic reaction process, and the Zn55Al1.6Si0.05La coating with minimum weight loss, Icorr ,Cc and maximum Rc showed the best corrosion resistance.更多还原