WANG Liliang*,YAN Jiehong,LI Sen.Study on Medium Temperature Deionized Water Seal of Chromic Acid Anodizing[J].Plating & Finishing,2020,(6):30-33.[doi:10.3969/j.issn.1001-3849.2020.06.0070]
铬酸阳极化中温去离子水封闭工艺研究
- Title:
- Study on Medium Temperature Deionized Water Seal of Chromic Acid Anodizing
- Keywords:
- chromic acid anodizing medium temperature deionized water seal aircraft corrosion resistance
- 文献标志码:
- A
- 摘要:
- 针对铬酸阳极化中温去离子水封闭工艺氧化膜水合度不易控制并且耐蚀性差的问题，研究了不同封闭温度下氧化膜的水合度以及阳极化保压时间等因素对耐蚀性的影响。结果表明：铬酸阳极化中温去离子水封闭工艺，封闭温度越低，达到水合度15 %的封闭时间越长，耐蚀性也越差，延长阳极化保压时间可以提高阳极化膜的耐蚀性。采用封闭温度70 ℃，保压时间45 min的工艺参数可以很好控制15 %的氧化膜水合度要求，并能够满足336 h盐雾试验的质量控制要求。
- Abstract:
- In view of the difficulty in controlling the extent of hydration and poor corrosion resistance of the anodized film in the process of medium temperature deionized water sealing of chromic acid anodizing, the influence of the extent of hydration of oxidation film under different sealing temperatures and the voltage holding time of anodizing on the corrosion resistance was studied. The results showed that the sealing process of chromic acid anodized with medium temperature deionized water, the lower the sealing temperature, the longer the sealing time to achieve 15 % hydration, but the worse the corrosion resistance. Prolonging the anodizing voltage holding time can improve the corrosion resistance of the oxidation film. The sealing temperature of 70 ℃ and the voltage holding time of 45 min can be used to control the 15 % hydration of oxidation film and meet the quality control requirements of 336 h salt spray test.
参考文献/References:
[1] Boeing Company. BAC5019(U) Chromic acid anodizing[S]. 2005.
[2] ASTM. B117-16 standard practice for operating salt spray (fog) apparatus[S]. 2004.
[3] Boeing Company. BSS7325(B) gravimetric method for determining the percent hydration of sealed anodic coatings[S]. 2013.
[4] ASTM. B137 Standard test method for measurement of coating mass per unit area on anodically coated aluminum[S]. 2014.
[5] 朱祖芳.铝合金阳极氧化与表面处理技术[M]. 北京:化学工业出版社, 2008.
相似文献/References:
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WANG Yanwei.Influence of Filling Process on Color Difference of Aluminum Alloy Shell after Chromic Acid Anodization[J].Plating & Finishing,2019,(6):40.[doi:10.3969/j.issn.1001-3849.2019.07.009]
备注/Memo
收稿日期： 2019-07-24；修回日期： 2019-09-17
通信作者： 王立亮（1980—），女，研究生，高级工程师，email: wang.liliang@sacc.com.cn