摘要
对常温和低温下铝的阳极氧化效果进行了比较,解释了所获得的氧化膜在厚度和硬度上不同的现象。试验以硫酸为电解液,分别在25℃和(3±1)℃下对铝进行阳极氧化。结果发现3℃下获得的氧化膜的硬度约是25℃下获得的1.5倍,而且膜的厚度也有所增加。扫描电镜发现这两个温度下得到的氧化膜形貌大不相同。25℃下所得氧化膜的孔呈百合花状,口大而底窄,孔径达到2μm。而3℃下所得氧化膜呈立体网络结构,有如桦树叶的堆积,空隙在200nm左右。可见,前者有利于染色,后者有利于提高硬度。
Aluminum anodizing is carried out at 25℃ and （3 ± 1 ）℃ in sulfuric acid solution, respectively. The result shows that the hardness of film obtained at （ 3±1 ） ℃ is roughly 1.5 times of that at 25 ℃, and the thickness also increases. The oxidation layers obtained at above temperature conditions are substantially different by scanning electronic microphotographs. The pore formed at 25℃ has a broad mouth with a diameter as big as 2 micrometers. And the film formed at （ 3 ± 1 ） ℃ is of a stereo net-work structure with pores in a diameter of about 200 nanometers. It can be concluded that anodizing at higher temperature is favorable to dying treatment thereafter and at lower temperature is favorable to increasing hardness.
出处
《表面技术》
EI
CAS
CSCD
2006年第2期51-52,共2页
Surface Technology
关键词
铝
阳极氧化
常温
低温
厚度
硬度
Aluminum
Anodizing
Ordinary temperature
Low temperature
Thickness
Hardness
