表面技术2015，Vol.44Issue(11)：40-45,6.DOI:10.16490/j.cnki.issn.1001-3660.2015.11.007
电解液对2A12铝合金硬质阳极氧化膜层性能的影响
Influence of Electrolyte on the Properties of Hard Anodic Oxide Coating on 2 A12 Aluminium Alloy
钱建才 1邹洪庆 1许斌 1吴厚昌 1吕基成 1方敏1
作者信息
- 1. 西南技术工程研究所 国防科技工业自然环境试验研究中心,重庆400039
- 折叠
摘要
Abstract
Objective To study the properties of hard anodic oxidation coatings on 2A12 aluminum alloy prepared in the electro-lyte of sulphuric acids and hybrid acids separately,in order to find out the influencing mechanism of hybrid acids on hard anodic ox-idation process of 2A12 aluminum alloy, and provide method to enhance the coating corrosion resistance. Methods The properties of hard anodic oxide coatings prepared in different electrolytes were analyzed and characterized by thickness, micro-hardness, SEM morphology, polarization curve and AC impedance spectroscopic to investigate the influence of different electrolytes on the perform-ance of hard anodic oxidation coatings on 2A12 aluminum alloy. Results The phenomenon of hard anodic oxide coatings on 2A12 aluminum alloy prepared in electrolyte of sulphuric acids such as ablation, non-uniform distribution of thickness and micro-hardness can be resolved by active adsorption of organic acids in electrolyte of hybrid acids, and the thickness distribution range was 35~38 μm, the micro-hardness distribution range was 386~407HV0. 05. The polarization curve and the EIS analysis showed that the cor-rosion potential of unsealed and sealed coating was -619. 93 mV and -74. 69 mV separately, the barrier layer resistance of un-sealed and sealed coating was 1. 4×105 Ω·cm2 and 2. 376×106 Ω·cm2 separately, which indicated that corrosion resistance can be enhanced and improved by sealing. Conclusion Hard anodic oxide coatings on 2A12 aluminum alloy can be stably prepared in electrolyte of hybrid acids, and the coating should be sealed.关键词
2A12铝合金/硬质阳极氧化/显微硬度/耐蚀性/极化曲线/交流阻抗Key words
2A12 Aluminium alloy/hard anodic oxide/micro-hardness/corrosion resistance/polarization curve/AC-impe-dance分类
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钱建才,邹洪庆,许斌,吴厚昌,吕基成,方敏..电解液对2A12铝合金硬质阳极氧化膜层性能的影响[J].表面技术,2015,44(11):40-45,6.
