摘要
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10V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、25 V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.
The influence of voltages on anodic films of Mg alloy by constant voltage anodic oxidation was studied. By voltage of 10V, no sparks could be found on the surface of the sample ,corresponding to a tra- ditional anodizing. By voltages of 15,20 and 25V, a multitude of small sparks covered the entire surfaces of the samples. These can be described as a micro-arcing regime. The films formed by 10,15,20 and 25 V were mainly composed of A1203, Na4 （A1SiO4） 3 （OH） , Al2SiO5 and SiO2. It was found that corrosion re- sistance increased with increasing voltage from 10V to 20V, but the corrosion resistance of the film formed at 25V decreased,compared to the film formed at 20V,due to bigger pores caused by intensive sparks.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2009年第1期11-14,共4页
Corrosion Science and Protection Technology
关键词
镁合金
阳极氧化
耐蚀性
Mg alloy
anodizing
corrosion resistance
