采用无机熔融盐电镀铝、热浸镀铝工艺联合的方法在钢基材表面制备了一层平整、连续的铝镀层,研究了铝镀层在不同氧化时间下的氧化行为。利用X射线衍射仪（XRD）、扫描电镜（SEM）和能谱分析（EDS）对氧化层的形貌和成分进行分析,并考察了氧化层的硬度和耐腐蚀性能。结果表明：将无机熔融盐电镀铝法和热浸镀铝法相结合可获得良好的铝镀层;铝镀层在900℃下热处理20 h后,可获得连续致密的Al2O3膜;Al2O3层有效提高了钢基材的表面硬度和耐腐蚀性能。
Smooth and continuous aluminum coatings on stainless steel surface was prepared by electroplating aluminum and hot dip aluminizing.Oxidation behavior of the aluminum coatings at high temperatures was investigated.Morphology and composition of the coatings after oxidation were studied by scanning electron microscopy（SEM）,EDS analysis and X-ray diffraction（XRD）.Surface hardness and corrosion resistance of the oxidized coatings were examined.The results show that aluminum coatings with high stability and quality can be achieved by electroplating aluminum and then hot dip aluminizing.A continuous and dense Al2O3 film in the coatings is obtained after oxidation at 900 ℃ for 20 h,which greatly improves surface hardness and corrosion resistance of the coatings.
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