摘要
将碳钢在Zn-0.2%Al(质量分数)和Zn-5%Al-RE合金中热浸镀后,分别进行水冷和空冷。对镀层进行了表面及截面形貌观察(SEM)、Tafel极化曲线测试、中性盐雾实验及X射线衍射分析(XRD)。Zn-0.2%Al镀层在浸镀后进行快速冷却(水冷),可使晶粒细化,耐蚀性能提高;Zn-5%Al-RE合金镀层进行水冷后,其共晶组织结构由片层状转为颗粒状,耐蚀性能降低。讨论了冷却方式与镀层结构、耐蚀性能之间的关系。
Carbon steel samples were galvanized in molten alloys Zn-0.2%Al and Zn-5%Al-RE, and then quenched in air and water respectively. The effect of cooling method on the microstructure and corrosion resistance of the coatings was studied by means of SEM and XRD, as well as neutral salt spray test and polarization curve measurement. The water-cooled coating Zn-0.2% Al exhibited microstructure with finer grains and better corrosion resistance rather than the air-cooled one. Both of the air-and watercooled coatings of Zn-5%Al-RE showed eutectic-like microstructure, but the air-cooled one was laminarlike with better corrosion resistance, while the water-cooled one was granular-like with inferior corrosion resistance.
作者
岳增武
武臻
张振岳
李辛庚
樊志彬
郭凯
YUE Zengwu, WU Zhen2, ZHANG Zhenyue, LI Xingeng, FAN Zhibin1, GUO Kai1(1 Shandong Electric Power Research Institute, Ji＇nan 250002, China 2 State Grid Henan Electric Power Company, Zhengzhou 450018, Chin)
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2018年第2期177-181,共5页
Corrosion Science and Protection Technology
关键词
热浸镀
冷却
组织
腐蚀
锌铝镀层
hot dip galvanizing, cooling method, microstructure, corrosion, Zn-AI coating
