研究了恒压条件下,电压对阳极氧化膜性能的影响.结果表明:恒压10 V的阳极氧化,阳极表面没有电火花的产生,类似于普通的阳极氧化;而恒压15、20、25 V的阳极氧化,阳极表面有电火花产生,是微火花放电阶段;恒压10、15、20、25V制得的阳极氧化膜主要成分是MgO,同时含有Al2O3以及Na4(AlSiO4)3(OH)、Al2SiO5、SiO2等;从10 V到20 V,随着电压的提高,试样耐蚀性提高;25 V时电火花的强度较大,放电气孔平均孔径较大,降低了有效厚度,耐蚀性下降.
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