Dai Xiaoliang,Liu Zhigang*.Preparation and performance evaluation of passivation paste for in-situ repair of aircraft components and parts Dong Ying1, Wang Zhaolin1, Wen Yinghui1, Song Bin1, Mi Nan 1,[J].Plating & Finishing,2025,(01):59-66.
doi: 10.3969/j.issn.1001-3849.2025.01.010飞机零部件原位修复用钝化膏的制备及性能评价
- Title:
- Preparation and performance evaluation of passivation paste for in-situ repair of aircraft components and parts Dong Ying1, Wang Zhaolin1, Wen Yinghui1, Song Bin1, Mi Nan 1,
- Keywords:
- paste; water solubility; brush passivation; film integrity; corrosion resistance
- 分类号:
- TQ153.2
- 文献标志码:
- A
- 摘要:
- 针对飞机上不锈钢零部件原位修复过程中所使用的刷涂钝化溶液流淌并污染周边区域的问题，本文以有机酸制备钝化膏，并开展了性能验证评价，为钝化溶液的替代奠定基础。研究结果表明：钝化膏呈无色透明凝胶状，粘度600 mPa·s，在5 ℃和38 ℃下存放6个月无变化；以水擦拭易去除；钝化后不锈钢材料表面无挂灰、暴露的结晶组织、麻坑等现象。金相显微镜下观测处理后的试件，组织无改变。利用X射线光电子能谱表征与化学置换法检测试件成分，试件表面不含Fe元素。按照GJB 150.11A进行96 h干湿交替盐雾试验，试件表面无红色锈蚀。钝化膏性能可满足机上零部件损伤后的原位修复需求。
- Abstract:
- In order to solve the problem of brush passivation solution flowing and contaminating the surrounding parts during the in-situ repair of stainless steel components and parts on aircraft, passivation paste was prepared with organic acid, and performance evaluation of the passivation paste was carried out, laying the foundation for the replacement of brush passivation solution. The results showed that the passivation paste was colorless and transparent gel, with a viscosity of 600 mPa·s, and remained unchanged at 5 ℃ and 38 ℃ for 6 months. It is easy to remove by wiping with water. After passivation, the surface of stainless steel parts has no hanging ash, exposed crystalline structure, pits and other phenomena. The microstructure of the specimen was not changed after observation under metallographic microscope. The composition of the specimen was detected by X-ray photoelectron spectroscopy and chemical substitution method, and the surface of the specimen did not contain Fe element. According to GJB 150.11A, the dry-wet alternating salt spray test was carried out for 96 h, and no red rust was found on the surface of the specimen. The performance of passivation paste can meet the needs of in-situ repair of damaged components and parts on aircraft
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