| 纯铝材在硫酸中恒流阳极氧化机理初探 |
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| 引用本文： | 张胜涛,曹阿林. 纯铝材在硫酸中恒流阳极氧化机理初探[J]. 材料保护, 2009, 42(3) |
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| 作者姓名： | 张胜涛 曹阿林 |
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| 作者单位： | 重庆大学化学化工学院,重庆,400030;重庆大学化学化工学院,重庆,400030 |
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| 摘 要： | 为研究铝阳极氧化膜氧化生成机理,采用恒流电解法,对铝试样在硫酸中的阳极氧化过程进行了研究.通过对铝阳极氧化时的阳极氧化电位-时间关系分析发现,阳极氧化电位出现规则的阶跃现象,其阶跃电位为0.039 0 V,根据其氧化电流密度-时间曲线计算出阳极氧化膜的孔隙率为0.1.结果分析表明,氧化电位阶跃与阻挡层厚度的增加密切相关,氧化电位的阶跃主要是由于阻挡层的增厚引起的,阻挡层首先在孔隙面积上生成,当厚度每增加1.530×10-8cm时,发生铺展作用.
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| 关 键 词： | 纯铝材 阳极氧化 硫酸 恒电流 阻挡层 电位阶跃 机理 |
Primary Study of the Mechanism for Constant-Current Anodizing of Aluminum in Sulfuric Acid |
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| ZHANG Sheng-tao,CAO A-lin. Primary Study of the Mechanism for Constant-Current Anodizing of Aluminum in Sulfuric Acid[J]. Journal of Materials Protection, 2009, 42(3) |
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| Authors: | ZHANG Sheng-tao CAO A-lin |
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| Affiliation: | ZHANG Sheng-tao,CAO A-lin ( College of Chemistry , Chemical Engineering,Chongqing University,Chongqing 400044,China) |
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| Abstract: | The anodic oxidation process of aluminum in sulfuric acid has been investigated at constant current. The mechanism for the for-mation of anodic oxidation coating on Al was primarily studied,and the anodizing potential-time relation of Al was analyzed. Re-sults indicate that the potential -time relation of Al anodizing in sulfuric acid was dominated by regular stepped potential,and the regular stepped potential was measured as 0.039 V. Using anodi-zing current density -time curve,the porosity of the anodizin... |
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| Keywords: | Al anodizing sulfuric acid constant current barri-er layer regular stepped potential mechanism |
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