Accelerated Corrosion Environment Spectrum and Equivalent Relation of Composite Materials in Ocean Atmospheric Environment

Natural environment acceleration test is an important method for assessing the calendar life of aircraft structures. The accelerated environmental spectrum is the key to carry out the accelerated test. An accelerated corrosion spectrum for the composite materials of helicopter was presented, and the equivalent accelerated relation was estimated. The equivalent relation between the accelerated corrosion enviroment spectrum and the enviroment on the deck was validated by hygroscopic degree and micrography. The results showed that the corrosion degree after accelerated corrosion and natural environment exposure was consintent with a confidence level of 95%.