材料科学
微观结构
腐蚀
涂层
包层(金属加工)
复合材料
冶金
复合数
合金
扫描电子显微镜
防腐
压痕硬度
激光器
作者
Qiaofen Bai,Jian Zhang,Li Qinwei,Rui Wang,Chunjiang Zhao
标识
DOI:10.1016/j.matlet.2021.131429
摘要
• Fe-based coatings were prepared by combining HSLC and PST techniques. • The influence of ferrite on the corrosion resistance of the coating was discussed. • The microstructure and composition of the coating were analysed. Fe-based alloy coatings are promising for protecting the surface of hydraulic columns because of their excellent corrosion resistance. In this study, Fe-based coatings were prepared using high-speed laser cladding (HSLC) technology, and the outer surface of the coating was subjected to powerful spinning treatment (PST). The grains of the surface layer of the coatings were refined, which increased the volume ratio of intergranular ferrite, and subsequent X-ray diffraction detection revealed more α-phases. Their electrochemical corrosion behaviour in a 3.5% NaCl solution indicated that PST coatings exhibited higher corrosion resistance than the coatings without PST. The anti-corrosion mechanism was discussed based on grain refinement, phase composition, and elemental content.
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