Aircraft materials and products can be corroded by the salt fog environment in ocean areas. In this paper, the performance of the composite coating on the avionics cases was examined by salt fog test. Coating’s failure mechanisms were analyzed according to the electrochemical method and infrared analysis. The result shows that physical factor is the main reason for the coating failure. The micro-holes and defects are the sources that pitting corrosion occurs on the metal. What is more, integrity is affected by the micro defect. The main reason for the coating failure is that those electrolytes penetrate into the coating through micro-holes and defects, finally reach to the metal substrate and cause corrosion on the metal. The whole corrosion process can be characterized accurately by EIS (Electrochemical Impedance Spectroscopy).
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鞠成玉,王晓慧,朱润,任晓明.盐雾试验对电子设备机箱涂层的影响[J].机床与液压,2014,42(6):28-31. . Influence of salt fog test on the performance of the compositec oating on avionics cases[J]. Machine Tool & Hydraulics,2014,42(6):28-31