2A96铝合金表面阳极氧化及性能研究

针对铝合金表面极易氧化生成结构疏松、耐腐蚀性差的氧化膜问题，利用阳极氧化法对2A96铝 合金表面进行防腐蚀处理。通过改变阳极氧化实验中的氧化电压，在2A96铝合金表面制备不同的阳极氧 化膜；利用金相显微镜观察各个阳极氧化膜的表面形貌、测厚仪测量其厚度、显微硬度计测定其硬度、 点滴实验获取其点滴时间、电化学工作站获取其极化曲线和交流阻抗谱，进而对阳极氧化膜的耐腐蚀性 进行研究。结果表明，在所测电压范围（8~16 V）内，随着电压的升高，阳极氧化膜的厚度、硬度、点 滴时间也逐渐增加，耐腐蚀性能也随之增强。2A96铝合金经过表面阳极化处理后，其性能显著提高。

Study on Anodizing and Properties of 2A96 Aluminum Alloy Surface

The surface of the aluminum alloy tends to get oxidized to form an oxide film with porosity structure and poor corrosion resistance. The surface of the 2A96 aluminum alloy was treated by anodizing. Different anodized films were prepared on the surface of 2A96 aluminum alloy by changing the oxidation voltage in the anodizing experiment. The surface morphology of each anodized film was observed by the metallographic microscope, while the thickness of the anodized film was measured by a thickness gauge, and the microhardness tester was used for measuring the hardness, with spotting experiment for obtaining its drip time, and electrochemical workstation for obtaining its polarization curve and AC impedance spectrum, and then its corrosion resistance was studied. The results showed that the thickness, hardness and drip time of the anodized film increased gradually with the increase of voltage within the measured voltage range (8~16 V), and the corrosion resistance was also enhanced. After the surface anodization of 2A96 aluminum alloy, its performance was significantly improved.