热镀纯锌、锌铁合金及锌铝镁镀层的耐蚀性分析  

Analysis of Corrosion Resistance on Hot-Dip Pure Zinc Coating,Zn-Fe Alloy Coating and Zinc-Aluminum-Magnesium Coating

作　　者：冀鹏 于春满 黄伟 李双一 JI Peng;YU Chun-man;HUANG Wei;LI Shuang-yi(GEELY Holding,Pick-Up Program(Prepare),Research and Development Center,Hangzhou 310000,China)

机构地区：[1]吉利控股集团皮卡项目(筹)研发中心,浙江杭州310000

出　　处：《材料保护》2022年第2期95-98,共4页Materials Protection

摘　　要：为明确热镀纯锌板、锌铁合金板、锌铝镁板之间的相对耐蚀性,供后续切换锌铝镁板提供数据参考,采用SEM观察了3种镀层截面微观形貌以及磷化后表面微观特征,通过中性盐雾试验对比了不同种类镀层钢板、同种镀层不同镀层质量钢板试验后的失重情况以及平均腐蚀速率。结果表明:磷化后的锌铁合金板耐蚀性与纯锌板相当,锌铝镁板具有最好的耐蚀性,相对耐蚀性约是前2者的6.5倍;与50 g/m^(2)的纯锌板和锌铁合金板相比,采用35 g/m^(2)镀层质量的锌铝镁板可具有较高的耐蚀性。For identifying the relative corrosion resistance among the hot-dip pure Zn sheet,Zn-Fe sheet and Zn-Al-Mg sheet,and providing data support to switch to Zn-Al-Mg steel sheet,scanning electron microscope(SEM)was utilized to observe the section micro morphology and surface microstructure characteristics after phosphating of the three kinds of coatings.Meanwhile,the weight loss and average corrosion rate of different types of coated steel and the same type of coated steel with different coating weights after experiment were compared via neutral salt spray test.Results showed that The corrosion resistance of Zn-Fe alloy plate after phosphating was equivalent to that of pure zinc plate,and Zn-Al-Mg plate had the best corrosion resistance,and the relative corrosion resistance was about 6.5 times that of the pure zinc plate and Zn-Fe alloy plate.Compared with 50 g/m^(2) pure zinc plate and Zn-Fe alloy plate,the Zn-Al-Mg plate with 35 g/m^(2) coating weight had higher corrosion resistance.

关 键 词：热镀纯锌镀层 锌铁合金镀层 热镀锌铝镁镀层 相对耐蚀性 微观结构 

分 类 号：TG174.4[金属学及工艺—金属表面处理]