Abstract:

Aircraft service environment consists of humid and hot atmosphere on the airport, water soaking environment and hot air ageing environment.Based on the Faraday law and Arrhenius equation, a set of universal formulas of the equivalent environment is developed. According to the corrosion damage equivalent principle, the relative expression of an equivalent accelerated relation between the accelerated corrosion environment spectrum and ground environment spectrum is determined. Based on tests and survey, an accelerated corrosion test environment spectrum used for the critical area of aircraft structures is presented. Equivalent environment spectra of accelerating corrosion test for components and simulation structures are given.

Key words: corrosion damage, equivalent environment spectrum, accelerated test