Galvanic Corrosion Between Carbon Fiber Reinforced Plastics and Metallic Aeronautical Materials

摘要

The electrochemical behavior of carbon fiber reinforced plastics (CFRP) and the galvanic corrosion between CFRP and metallic aeronautical alloys were investigated. Rest potentials, mixed potentials, galvanic current densities, and polarization curves were measured. Influence of parameters such a pH-value, electrolyte agitation, distance between the samples, and area ratio was studied. Aluminium alloys (2024, 7010, 7050, 7075, 8090) show a high sensitivity to galvanic corrosion with CFRP; Ti-6A1-4V is the only alloy with uncritical galvanic corrosion behavior with CFRP.