利用化学浸泡法在 AZ91 D 镁合金表面制备铈盐转化膜,优化了铈盐转化处理工艺,研究了铈盐转化膜的微观形貌、组织结构及耐蚀性能。 在转化膜表面分别涂覆环氧树脂和氟碳树脂涂层,测试了两种复合涂层的力学性能。 结果表明:铈盐转化膜由双层膜组成,在优化的工艺条件下进行转化处理能够提高镁合金的耐腐蚀能力;铈盐转化膜对环氧树脂的适应性要优于氟碳树脂。

Ce conversion coating was prepared on the surface of AZ91 D magnesium alloy by chemical immersion, cerium conversion treatment process was optimized and the morphology of the cerium conversion coating, organizational structure and corrosion resistance were studied. Epoxy resin and fluorocarbon resin were respectively brushed on the conversion coating, and the mechanical properties of the two composite coating were tested. The results showed that the Ce conversion coating was consisted by two-layer-coatings and conversion processing in the optimization of process conditions is able to improve the resistance of basement to corrosion, the adaptability of Ce conversion coating to epoxy resin was better than to fluorocarbon resin.