铌合金涂覆前化学氧化工艺

摘要

Niobium alloy has been widely used in the aerospace industry for its excellent performance. But during the using process, the lives and the applications of the products made of niobium alloy were restricted due to the blister and rupture of coating layer. By considering the problems occurred in the niobium alloy coating, a general chemical oxidation technique for niobium alloy pre-coating treatment was summarized with a larger number of practice and test validation, which including the process of degrease, pre-etching, pickling, lightening and chemical oxidation. Under this technique, the preformance and and appearance of the coatings could be improved.%铌合金因其优异的性能被广泛用于航天航空工业.但在使用过程中,因表面涂覆涂层经常起泡破裂使产品寿命及用途受限.针对常用铌合金涂覆过程中出现的问题,通过生产实践及验证,总结出通用的铌合金涂覆前处理化学氧化工艺.该工艺主要通过除油、预浸蚀、酸洗、出光及化学氧化等工序对铌合金材质的零件进行化学处理,最终达到提高涂层性能和外观的要求.