Study on corrosive failure behavior of carbon fiber/epoxy composites by electrochemical methods

In order to understand how the environmental factors affect the internal structure of the carbon fiber reinforced epoxy resin composites (CFRERC), the relationship between the electrochemical parameters and the corrosive extent of the composites was investigated by means of the electrochemical impedance spectroscopy (EIS) and cyclic voltammograms (CV) curves. The test results show that the fiber itself does not react with the environment. The ions penetrate into composites and the ions concentration increases with the immersion time, which leads to the failure of the composites. The results indicate that the concentration and the penetration process of the ions in the carbon fiber reinforced epoxy resin composites can be detected by the electrochemical method.