缓蚀剂对雷达T/R组件腐蚀行为的影响

Effect of Corrosion Inhibitor on Corrosion Behaviour of Antenna T/R Module

T/R组件作为雷达系统的重要组成部分,在严酷海洋大气环境的侵蚀作用下,容易发生腐蚀,从而导致雷达系统性能下降,甚至引发故障。基于实测的某型机雷达舱环境数据,编制加速腐蚀试验环境谱,针对喷涂和未喷涂TFHS-20缓蚀剂的T/R组件开展当量加速腐蚀对比试验,并以收发通道芯片的微观腐蚀形貌、铝合金外壳蚀坑深度、T/R组件收发性能和输出功率等为指标参数,表征缓蚀剂对T/R组件腐蚀行为的影响。结果表明,TFHS-20缓蚀剂仅使T/R组件的输出功率降低0.59%~0.78%、接收增益降低0.11 dB~0.21 dB,缓蚀剂对T/R组件收发性能影响非常小。未喷涂缓蚀剂的T/R组件,在加速腐蚀试验的第4周期时,发射通道性能和接收通道功能失效;喷涂缓蚀剂的T/R组件,在加速腐蚀试验的8个周期时,接收通道功能失效。所以,TFHS-20缓蚀剂能够有效地提高T/R组件的使用寿命。

As an important part of radar system,T/R module is prone to corrosion under the severe marine atmospheric environment,which leads to the performance degradation of the radar system and even failure.Based on the measured environmental data of an aircraft radar cabin,the accelerated corrosion test environmental spectrum is compiled.The equivalent accelerated corrosion comparison test is carried out for the T/R module with and without TFHS-20 corrosion inhibitor.The influence of corrosion inhibitor on the corrosion behavior of T/R module is characterized by the micro corrosion morphology of the transceiver channel chip,the corrosion pit depth of aluminum alloy shell,the transceiver performance and output power of T/R module.The results show that TFHS-20 corrosion inhibitor can only reduce the output power of T/R module by 0.59%~0.78%and the receiving gain by 0.11~0.21 dB,that is,the effect of TFHS-20 corrosion inhibitor on the transceiver performance of T/R module is very small.For T/R components without corrosion inhibitor,transmit channel performance and receive channel function fail during the fourth cycle of accelerated corrosion test.For T/R components with corrosion inhibitor,the reception channel function fails during the eighth cycle of the accelerated corrosion test.Therefore,TFHS-20 corrosion inhibitor can significantly and effectively improve the service life of T/R module.