去腐蚀产物膏及氧化膏性能研究

目的研究自主研发的BT-2G钢腐蚀产物去除和快速磷化膏、ALT-1铝合金去腐蚀产物膏以及LYG-2铝合金局部化学氧化膏性能。方法观察并检测各种膏体的外观、流淌度、处理时间,并研究BT-2G处理样品的漆膜结合力及氢脆性能,ALT-1的去腐蚀效率和基体腐蚀性,LYG-2处理样品的漆膜结合力和耐蚀性。结果各种膏体均匀浓稠,流淌度均小于1 mm,在3 h内均可以完成处理过程,另外,BT-2G处理的样品可以通过漆膜结合力和氢脆测试,ALT-1的去腐蚀效率大于90%且对基体基本无腐蚀性,LYG-2通过漆膜结合力测试且中性盐雾72 h无腐蚀。结论各种膏体均满足飞机外场维修使用要求,可应用于维护/维修。

Performance of Rust Removal Paste and Oxidation Paste

Objective To study the performance of BT-2G steel rust removal and rapid phosphating paste, ALT-1 aluminium alloy rust removal paste and LYG-2 aluminium alloy partial oxidation paste which are developed by ourselves. Methods The appearance, the mobility and the reaction time of different pastes were observed and tested, the coating binding force and the hydrogen embrittlement of BT-2G were studied as well as the rust removal efficiency and the corrosivity for matrix of ALT-1 and the coating binding force and the corrosion resistance of LYG-2. Results The pastes were uniform thick liquids, the mobility was less than 1 mm, the process can be completed within 3 h. Moreover, the samples which were treated with BT-2G can pass the test of coating binding force and hydrogen embrittlement, the rust removal efficiency of ALT-1 was above 90%, ALT-1 had no corrosion influence on matrix. The samples treated with LYG-2 can pass the test of coating binding force and there was no corrosion after neutral salt spray for 72 h. Conclusion The pastes can satisfy the request of airfield maintenance, and can be applied in the aircraft maintenance/ repair.