Assessment Parameters of Corrosion Damage of Aged Aircraft Structure

The corrosion fatigue character of aluminum alloy structure was investigated.The Al alloy specimens precorroded in different corrosive solutions were tested under fatigue load.The two key parameters of describing corrosion damage,corrosion damage ratio and average depth of corrosion damage,were analyzed using experimental observation and finite element method.The preliminary results indicated that the two key parameters could be the appraisal parameters for corrosion damage of aluminum alloy structure.