飞机金属结构胶接修理前的原位表面处理技术研究

目的形成一套工程实用的金属飞机结构胶接修理前的原位表面处理技术方法。方法以典型铝合金为基材,采用便携式磷酸阳极化设备进行原位表面处理技术及工艺研究,并进行微观形貌、能谱分析和楔子耐久性试验对比验证。结果铝合金原位磷酸阳极化处理膜层中的氧含量较高,膜层较厚,且呈蜂窝状结构,体现了优良的抗腐蚀和耐久性。结论提出的铝合金结构胶接修理前原位磷酸阳极化处理方法,可改善严酷环境下应用情况的耐久性,其耐久性与传统的槽式磷酸阳极化表面处理相当。

In-situ Surface Treatment Technology Applied in Bonding-Repair of Aircraft Structure

Objective To put forward a set of engineering available In-situ surface treatment methods for bonding-repair of aircraft structure. Methods A portable phosphoric acid anodizing device was used to study in-situ surface treatment on typical aluminum alloy substrates, along with comparative study involving micro morphology analysis, energy spectrum analysis and durability test. Results The film created by in-situ phosphoric acid anodized on aluminum alloy substrates showed a thick honeycomb structure, and was rich in oxygen, which were the signs of corrosion resistance and durability capacity. Conclusions The in-situ surface treatment method for bonding-repair of aluminum alloy structure could improve the durability of bonding-repair structure in harsh environments, and the durability was equal to that of the traditional Tank PAA.