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用低碳钢表面热浸镀铝后进行微弧氧化的方法获得复合膜层。对此膜层进行了断面形貌观察和 X射线衍射分析 ;研究了陶瓷层厚度随微弧氧化时间及电流密度的变化规律。结果表明 :陶瓷层主要由κ- Al2 O3、θ- Al2 O3组成 ;复合膜层分三层 :最外层为陶瓷层 ,次层为纯铝层 ,靠近基体为 Fe- Al合金层 ;陶瓷层厚度随强化时间的增加有一极限值 ;当强化时间较短时 ,陶瓷层厚度随电流密度的增加而增加 ,时间较长时 ,随电流密度的增加厚度有一极限值
The surface of the mild steel is hot-dip aluminized and then the micro-arc oxidation method is adopted to obtain the composite film layer. The morphology of the film was observed by X-ray diffraction and X-ray diffraction analysis. The variation of the ceramic layer thickness with the micro-arc oxidation time and current density was studied. The results show that the ceramic layer is mainly composed of κ-Al 2 O 3 and θ-Al 2 O 3. The composite film is divided into three layers: the outermost layer is ceramic layer, the second layer is pure aluminum layer, and the Fe- Thickness increases with the strengthening time of a limit; when the strengthening time is short, the ceramic layer thickness increases with the current density increases, the longer the time, with the current density increases the thickness of a limit