席晓光.AZ91D镁合金脉冲阳极氧化处理及腐蚀性能评价[J].表面技术,2007,36(1):8-10.
XI Xiao-guang.Pulse-anodization Treatment and Evaluation of Corrosion Resistance for AZ91D Magnesium Alloy[J].Surface Technology,2007,36(1):8-10 |
| AZ91D镁合金脉冲阳极氧化处理及腐蚀性能评价 |
| Pulse-anodization Treatment and Evaluation of Corrosion Resistance for AZ91D Magnesium Alloy |
| 投稿时间：2006-10-31 修订日期：2007-02-10 |
| DOI： |
| 中文关键词: 镁合金 阳极氧化，脉冲，腐蚀 |
| 英文关键词:Magnesium alloy Pulse-anodization Corrosion |
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| 中文摘要: |
| 本文旨在采用高频脉冲电源和阶梯降流的方法，在碱性偏铝酸钠溶液中，在AZ91D合金表面制备阳极氧化膜。研究了成膜过程、膜层的结构和形貌；评价了膜层的耐酸性和在3.5%NaCl溶液中的耐腐蚀性能。结果表明，在本实验条件下，AZ91D合金表面可形成内层致密且较厚、外层相对较薄，厚度约100 m左右的氧化膜；阳极氧化膜的耐酸性能力远高于基体；阳极氧化处理后的合金的自腐蚀电位正移，在腐蚀性介质中极化阻力增大，腐蚀电流密度降低，耐腐蚀性能显著提高。 |
| 英文摘要: |
| The anodic film was prepared on AZ91D magnesium alloy in the bath of alkaline meta-aluminate by means of step decreasing current with high frequency pulse power. The formation process, structure and morphology of the anodic film were investigated. The acid-resistance and the corrosion resistance in 3.5%NaCl solution were evaluated. The results show that the anodic film is composed of two layers with the thickness of 100 m. The inner layer is compact and relatively thick, while the outer layer is a little thin. The acid resistance of the anodic film is superior to the matrix. After anodization treatment, the free corrosion potential of the AZ91D shifts to positive, and in the corrosive media, the corrosion current density decreases, which indicates that the corrosion resistance of the alloy is improved by the anodic treatment. |
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