铸造技术2017，Vol.38Issue(11)：2650-2652,2656,4.DOI:10.16410/j.issn1000-8365.2017.11.025
建筑用Q235钢的表面镀层与耐腐蚀性能研究
Surface Coating and Corrosion Resistance of Q235 Steel for Construction
杨建华 1庚天芮 1黄文怡2
作者信息
- 1. 江苏城乡建设职业学院实训中心,江苏常州213000
- 2. 江苏大学材料科学与工程学院,江苏镇江212013
- 折叠
摘要
Abstract
The 55Al-43Zn-2Si coating was prepared on the surface of the Q235 steel with hot dip plating method,the microscopic morphology,phase composition and corrosion resistance of coating was investigated.The results show that the coating on the surface of Q235 steel substrate is smooth,no obvious convex or concave,and dispersed micro pits or pinholes exist in the local area.The coating has been covering the surface of Q235 steel after hot dip plating,surface coating is only Al and zinc,and gray-black area is Al-rich phase,gray areas is zinc-rich phase;then Al and compound phase of corrosion,resulting in corrosion medium leakage caused by corrosion of Q235 steel substrate.The grey and white area for Zn rich phase of coating Q235 steel surface is corrosion firstly,and secondly,Al and its compound phase will be corrosion,lastly,the Q235 steel substrate will be corrosion and damaged with the leakage of corrosion liquid.关键词
热浸镀/Al-Zn/建筑用钢/形貌/腐蚀Key words
hot dip/Al-Zn/construction steel/microstructure/corrosion分类
矿业与冶金引用本文复制引用
杨建华,庚天芮,黄文怡..建筑用Q235钢的表面镀层与耐腐蚀性能研究[J].铸造技术,2017,38(11):2650-2652,2656,4.
