GAO Peiyun.Effect of Zirconium Salt Sealing on Corrosion Resistance of Anodic Oxide Film on Aluminium Alloy Used in Construction[J].Plating & Finishing,2022,(5):44-49.[doi:10.3969/j.issn.1001-3849.2022.05.008]
锆盐封孔对建筑铝合金阳极氧化膜耐蚀性能的影响
- Title:
- Effect of Zirconium Salt Sealing on Corrosion Resistance of Anodic Oxide Film on Aluminium Alloy Used in Construction
- Keywords:
- anodic oxide film; aluminium alloy used in construction; zirconium salt sealing; nickel-free sealing; corrosion resistance
- 分类号:
- TG174
- 文献标志码:
- A
- 摘要:
- 为了改善建筑常用 6463 铝合金的耐蚀性能，在其表面制备阳极氧化膜，然后采用氟锆酸钾溶液对阳极氧化膜进行封孔处理。研究了锆盐封孔对阳极氧化膜的微观形貌、表面成分和耐蚀性能的影响，并与沸水封孔和镍盐封孔进行了对比。结果表明：锆盐封孔对阳极氧化膜微观形貌的改善效果明显好于沸水封孔，阳极氧化膜中引入 Zr 元素，质量分数约为 19.35% 。锆盐封孔阳极氧化膜表面较平整致密，粗糙度为 0.296 μ m ，其耐蚀性能与镍盐封孔阳极氧化膜接近，明显好于沸水封孔阳极氧化膜。锆盐封孔具有双重封孔效果，可以有效抑制腐蚀过程，使阳极氧化膜的腐蚀电位正移约 103 mV ，腐蚀电流密度降低了超过一个数量级，腐蚀失重降低到 0.48 g/m 2 。
- Abstract:
- ： In order to improve the corrosion resistance of 6463 aluminum alloy which is commonly used in construction ， an anodic oxide film was prepared on its surface ， and then the anodic oxide film was sealed with potassium fluorozirconate solution. The effects of zirconium salt sealing on the microstructure ， surface composition and corrosion resistance of anodic oxide film were studied ， and compared with boiling water sealing and nickel salt sealing. The results showed that zirconium salt sealing has a better effect on the improvement of the microstructure of the anodic oxide film than that of boiling water sealing ， and Zr element was introduced into the anodic oxide film ， its mass fraction was about 19.35%. The surface of zirconium salt sealed anodic oxide film is flat and compact ， and the roughness is 0.296 μ m. Its corrosion resistance is close to that of nickel salt sealed anodic oxide film ， which is obviously better than that of boiling water sealed anodic oxide film. Zirconium salt sealing has double sealing effect ， which can effectively inhibit the corrosion process ， move the corrosion potential of anodic oxide film forward by about 103 mV ， reduce the corrosion current density by more than one order of magnitude ， and reduce the corrosion weight loss to 0.48 g/m 2 .
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备注/Memo
收稿日期： 2021-10-25 修回日期： 2021-12-27 作者简介： 高培云（ 1979 ―），女，硕士，讲师，主要研究方向：建筑工程材料、腐蚀与防护等， email ： gao_0351@126.com 基金项目： 山西省教育科学十三五规划 2019 年度规划课题（ GH-20190130 ）