Anodic degradation behaviour of carbon fibre in CFRP at high-chloride and -alkali condition

The anodic degradation process of carbon fibres (CFs) in carbon-fibre-reinforced-polymer (CFRP) composites was first examined under varying operating currents, particularly in the pore solution of seawater and sea sand concrete. A range of analytical techniques were employed to provide insights into the formation and characteristics of the decomposition products generated in the electrolyte and precipitate. The electrochemical reactions of anions and carbon occurred under the different potential significantly influence the corrosion behaviour of CFRP. The production of diverse forms and quantities of carbon oxides primarily arises from the oxidative deterioration of CFs' graphitic structure. These results reveal the anodic degradation behaviour of CFs, which contributes to the anodic degradation mechanism of CFRP materials, especially when exposed to different current levels in high-chloride and high-alkaline conditions.