舰载航空发动机用GH2150A压气机叶片的耐蚀性

Corrosion Resistance of GH2150A Compressor Blade for Shipborne Aeroengine

高温、高湿、高盐雾的海洋环境,给舰载航空发动机带来了严重的腐蚀风险。压气机是大气流经发动机的主要通道,其叶片直接受到高压、高速和潮湿海洋大气的冲刷和腐蚀,造成的损伤与失效尤为突出。根据某型舰载航空发动机高压压气机叶片的服役条件,对GH2150A和GH2150A+化学钝化两种状态的高压压气机叶片进行了192h酸性盐雾试验、680h酸性大气腐蚀试验及100h,600℃涂盐热腐蚀试验。结果表明;两种状态的叶片都表现出良好的耐酸性盐雾和酸性大气腐蚀性能;然而,经过20h涂盐热腐蚀试验后,两种叶片均出现红色腐蚀斑点,60h后整个叶片均被腐蚀,其中经过化学钝化的叶片经100h涂盐热腐蚀试验后,碱洗质量损失较原始叶片更小,表明化学钝化在一定程度可以阻碍腐蚀,但防护能力有限。

The high temperature,high humidity,and high salt spray in the marine environment pose a serious corrosion risk to carrier-based aircraft engines.The compressor is the main channel through which the atmosphere flows through the engine,and its blades are directly eroded and corroded by the high pressure,high speed,and humid marine atmosphere,resulting in particularly prominent damage and failure.According to the service conditions of high-pressure compressor blades in a certain type of carrier-based aircraft engine,192 hours of acid salt spray testing,680 hours of acid atmospheric corrosion testing,and 100 hours of 600°C salt coating hot corrosion testing were conducted on high-pressure compressor blades in GH2150A and GH2150A+chemical passivation states.The results indicate that both types of leaves exhibited good salt spray resistance and acidic atmospheric corrosion performance.However,after 20 hours of salt-hot corrosion testing,both types of blades showed red corrosion spots,and after 60 hours of testing,the entire blade was corroded.Among them,the chemically passivated blade had less loss of quality after 100 hours of salt-hot corrosion testing compared to the original blade,indicating that chemical passivation could hinder corrosion to a certain extent,but its protective ability was limited.