铝合金微弧氧化技术应用研究

目的研究铝合金微弧氧化技术在产品三防方面的应用。方法选取四种不同牌号的常用铝合金结构件材料进行微弧氧化处理，并通过各种检测手段测定铝合金微弧氧化膜层的成分及形貌、硬度及耐磨、耐腐蚀等性能指标，并与硬质阳极氧化技术作对比。结果微弧氧化膜层厚度为20～120μm，氧化膜致密层硬度（Hv）〉900，致密层磨损率〈10^-4mm^3／（N·m），盐雾试验时间〉96h，湿热试验时间〉10个周期，膜层性能优于硬质阳极氧化膜。结论微弧氧化技术能大大提高铝合金的耐磨和耐腐蚀性能，可应用于提升产品三防性能。

Study on Application of Aluminum Alloy with Micro Arc Oxidation

Objective To study the aluminum alloy Micro Arc Oxidation （MAO） technology in the application of product protection in three aspects. Methods Four different brands of commonly used aluminum alloy structure materials were selected for MAO treatment, and the performance indices of the MAO coatings of the aluminum alloy, such as composition and appearance, hardness and wear resistance and corrosion resistance, were determined through a variety of detection means, and were compared with those of the hard anodic oxidation technology. Results the thickness of the MAO film layer was 20-120μm, the hardness （HV）of the dense oxide film layer was greater than 900, the abrasion resistance of dense layer and wear rate were less than 10-4 mm^3/N· m, the salt spray test time was more than 96 h, and the humid heat test time was more than 10 cycles, indicating that the performance was better than that of the hard anodic oxidation film membrane layer. Conclusion The MAO technology can greatly improve the abrasion resistance and corrosion resistance of aluminum alloy, and can thus be applied to improve the product performance in the three aspects of prevention.