Research on Corrosion Prediction Technology of Lap Joint Structures with Dissimilar Materials Based on Boundary Element

摘要

In order to assess the safety and reliability of lap joint structures with dissimilar materials in aircraft, the mixed structure of CFRP and 2A12 was taken as an example, and a calculation model that based on the boundary element method was provided to simulate the galvanic corrosion. Depend on this, the research in the influence of the electrolyte concentration and the film thickness on the corrosion current density and potential distribution on the surface of simulation structures was developed. Meanwhile, the measured data was also used to verify the accuracy of the output result of the model. The comparsion result shows that outputs of the model are in good agreement with experiment datas. This model can be used to predict the galvanic corrosion in the lap joint structure in aircraft, thus minimizing the potential threats caused by corrosion to the flight safety.