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通过己二酸-硫酸工艺制备了SiCP/A1合金(2A12)复合材料阳极氧化膜,研究了不同阳极氧化温度下(15~35℃)制备的SiCP/2A12复合材料阳极氧化膜温度冲击后的开裂行为及耐蚀性能。采用FE-SEM对温度冲击前后SiCP/2A12复合材料阳极氧化膜的微观形貌进行了分析,采用电化学阻抗谱(EIS)研究了冲击前后SiCP/2A12复合材料阳极氧化膜的耐腐蚀性能。结果表明:温度冲击对不同阳极氧化温度制备的SiCP/2A12复合材料阳极氧化膜影响程度不同,随着阳极氧化温度的升高,温度冲击后SiCP/2A12复合材料阳极氧化膜的裂纹密度逐渐增加。阳极氧化温度为25℃时,温度冲击后SiCP/2A12复合材料阳极氧化膜耐蚀性最好。SiCP/2A12复合材料阳极氧化膜的耐温度冲击性能优于2A12铝合金氧化膜。
Anodic oxide films of SiCP / Al alloy (2A12) were prepared by adipic acid-sulfuric acid process. The cracking of SiCP / 2A12 composite anodic oxide films after impact at different anodization temperature (15 ~ 35 ℃) Behavior and corrosion resistance. The micro-topography of SiCP / 2A12 composite anodic oxide film before and after temperature shock was analyzed by FE-SEM. The corrosion resistance of SiCP / 2A12 composite anodic oxide film before and after impact was studied by electrochemical impedance spectroscopy (EIS). The results show that the impact of temperature on the anodic oxide films of SiCP / 2A12 composites prepared by different anodic oxidation temperatures is different. With the increase of anodic oxidation temperature, the crack density of anodic oxide films of SiCP / 2A12 composites increases gradually. Anodic oxidation temperature of 25 ℃, after the temperature impact SiCP / 2A12 composite anodic oxide film corrosion resistance best. The SiCP / 2A12 composite anodic oxide film is superior to the 2A12 aluminum oxide film in temperature shock resistance.