桥梁缆索用高强度Zn-10%Al-RE合金镀层钢丝耐蚀性能研究与应用  

Application and corrosion resistance research of high strength Zn‑10%Al‑RE alloy coated steel wire for bridge cables

作　　者：夏浩成 赵军 朱晓雄 王志刚 章盛 肖国豪 XIA Haocheng;ZHAO Jun;ZHU Xiaoxiong;WANG Zhigang;ZHANG Sheng;XIAO Guohao(Jiangsu Tokyo Rope Co.Ltd.,Wuxi 214445,China;Jiangsu Fasten Cable Co.Ltd.,Wuxi 214445,China)

机构地区：[1]江苏东纲金属制品有限公司,江苏无锡214445 [2]江苏法尔胜缆索有限公司,江苏无锡214445

出　　处：《现代交通与冶金材料》2023年第2期32-39,共8页Modern Transportation and Metallurgical Materials

基　　金：广东省重点领域研发计划项目(2019B111106002)。

摘　　要：对桥梁缆索用高强度纯锌镀层、Zn-5%Al-RE合金镀层和Zn-10%Al-RE合金镀层钢丝的镀层组织及耐蚀性能进行了对比研究。研究结果表明,Zn-10%Al-RE合金镀层由于Al含量的提高,镀层中Zn-Al共晶相的比例较Zn-5%Al-RE合金镀层更大,且具有更多耐腐蚀的富铝相,说明其具有更好的耐蚀性能。从电化学分析和中性盐雾试验结果来看,纯锌镀层的自腐蚀电流密度约为Zn-10%Al-RE合金镀层的3倍,不同时间下的中性盐雾腐蚀失重为纯锌镀层的3.9~5.7倍,说明其在同一腐蚀环境中的耐蚀性能至少能够达到纯锌镀层的3倍以上。In this paper,the microstructure and corrosion resistance of high strength pure zinc coating,Zn-5%Al-RE alloy coating and Zn-10%Al-RE alloy coating steel wire for bridge cable are studied.The results show that the proportion of Zn-Al eutectic phase in Zn-10%Al-RE alloy coating is larger than that of Zn-5%Al-RE alloy coating due to the increase of Al content,which indicates that the coat‑ing has better corrosion resistance.According to the results of electrochemical analysis and neutral salt spray test,the self-corrosion current density of pure zinc coating is about 3 times of that of Zn-10%Al-RE alloy coating,and the weight loss of neutral salt spray corrosion is 3.9-5.7 times of that of pure zinc coating under different time,which indicates that the corrosion resistance can be at least 3 times of that of pure zinc coating in the same corrosion environment.

关 键 词：桥梁缆索钢丝 Zn-10%Al-RE合金镀层 电化学分析 盐雾试验 耐蚀性能 

分 类 号：U443.38[建筑科学—桥梁与隧道工程] TG174.4[交通运输工程—道路与铁道工程]