研究了沸水封闭、醋酸镍封闭和电压加载下己二酸铵封闭对LY12铝合金阳极氧化膜耐蚀性的影响。通过场发射扫描电镜（FE-SEM）和电化学阻抗谱（EIS）对三种无铬封闭方法处理后铝合金阳极氧化膜的表面微观形貌和耐蚀性进行了研究。结果表明：封闭处理可以有效地闭合阳极氧化膜的微孔,提高氧化膜耐腐蚀性能。电压加载下己二酸铵封闭可以有效缓解氧化膜的腐蚀。三种无铬封闭方法处理后的氧化膜耐腐蚀性能从小到大依次为：沸水封闭,醋酸镍封闭,电压加载下己二酸铵封闭。
Effects of boiling water sealing,nickel acetate sealing and ammonium adipate sealing under voltage loading on corrosion resistance of anodic oxide films on LY12 aluminum alloy were studied.Surface morphology and corrosion resistance of the anodic oxide films on aluminum alloy sealed by the three chromium-free methods were studied by means of field emission scanning electron microscopy（FE-SEM） and electrochemical impedance spectroscopy（EIS）.The results show that pores of the anodic oxide films are closed after sealing.Ammonium adipate sealing under voltage loading can improve significantly corrosion resistance of the anodic oxide films.Corrosion resistance of the anodic oxide films sealed by three chromium-free methods increases in the following order：boiling water sealing,nickel acetate,ammonium adipate sealing under voltage loading.
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