Zhou Hongye,Jing Xuchu,Xu Xiaowen,et al.Anodic oxidation of aluminum alloy used for construction in sulfuric acid and malic acid electrolyte and sealing in mixed solution[J].Plating & Finishing,2023,(6):16-24.[doi:10.3969/j.issn.1001-3849.2023.06.003]
建筑铝合金硫酸-苹果酸阳极氧化及混合溶液封孔
- Title:
- Anodic oxidation of aluminum alloy used for construction in sulfuric acid and malic acid electrolyte and sealing in mixed solution
- 关键词:
- 5052 铝合金; 阳极氧化; 硫酸 - 苹果酸电解液; 苹果酸浓度; 混合溶液封孔
- Keywords:
- 5052 aluminium alloy ; anodic oxidation ; sulfuric and malic acid electrolyte ; concentration of malic acid ; sealing with mixed solution
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 选用建筑领域常用的 5052 铝合金作为基材，在硫酸 - 苹果酸电解液中进行阳极氧化，确定了电解液中苹果酸的最佳浓度。为进一步提高阳极氧化膜的耐蚀性，分别浸在沸腾去离子水、钛盐溶液、铈盐溶液以及钛盐与铈盐混合溶液中封孔处理。结果表明：当电解液中苹果酸浓度为 50 g/L 时，阳极氧化膜的致密性最好（孔洞面积比为 6.6 % ），腐蚀电流密度仅为 2.47×10 -6 A/cm 2 ，与不添加苹果酸时制备的阳极氧化膜相比降低了一个数量级，与 5052 铝合金相比降低了两个数量级，表现出良好的耐蚀性。在不同溶液中封孔后阳极氧化膜的微观形貌发生显著变化，孔洞明显减少，耐蚀性进一步提高，尤其在钛盐与铈盐混合溶液中封孔后阳极氧化膜表现出更好的耐蚀性，腐蚀电流密度降低到 4.42×10 -7 A/cm 2 。但封孔起不到明显的强化作用和提高阳极氧化膜抵抗塑性变形的能力，对阳极氧化膜的硬度和耐磨性没有显著性影响。
- Abstract:
- ： 5052 aluminum alloy commonly used in the construction field was anodized in sulfuric acid and malic acid electrolyte ， and the optimal concentration of malic acid in the electrolyte was determined. In order to further improve the corrosion resistance of the anodized film ， it was sealed in boiling deionized water ， titanium salt solution ， cerium salt solution and titanium salt and cerium salt mixed solution. The experimental results show that ， when the concentration of malic acid in the electrolyte is 50 g/L ， the anodized film has the best compactness with the lowest area ratio of hole of 6.6 % ， and the corrosion current density is only 2.47×10 -6 A/cm 2 ， which is more than one order of magnitude lower than that of the anodized film prepared without malic acid ， and nearly two orders of magnitude lower than that of 5052 aluminum alloy ， showing excellent corrosion resistance. After sealing in different solutions ， the morphology of the anodized film changes significantly ， the holes are significantly decreased ， and the corrosion resistance is further improved. Particularly ， the anodized film sealed in titanium salt and cerium salt mixed solution shows better corrosion resistance ， and the corrosion current density decreases to 4.42×10 -7 A/cm 2 . However ， sealing can not strengthen the anodized film and improve the plastic deformation resistance ability ， therefore it has no significant effect on the hardness and wear resistance of the anodized film.
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备注/Memo
收稿日期： 2022-11-28 修回日期： 2022-12-23 作者简介： 周宏业（ 1983 —），硕士，讲师，主要研究方向：建筑结构材料、功能材料等， email ： Hy_cang1983@126.com * 通信作者： 陈林（ 1984 —），硕士，讲师，主要研究方向：建筑结构材料、表面工程等， email ： Chenl_czvtc@sina.com 基金项目： 河北省 333 人才工程资助项目（ A202001101 ）?/html>