Galvanic Corrosion Behavior between Corrosion-resisting Aluminum Alloy and Carbon Fiber Composite

Upon wide application of corrosion-resisting aluminum alloy and carbon fiber composite to aerospace industry,the contact between them is inevitable.In the presence of corrosive medium,the galvanic corrosion will occur because of the potential difference between them.The effects of the system temperature(0 ℃,10 ℃,30 ℃,60 ℃,80 ℃)and the concentration of sodium chloride in electrolyte(1%,3.5%,7%,10%,14%)on galvanic corrosion were studied.The corrosion morphology and composition were examined by SEM and EDS.It was found that the galvanic corrosion current changed with the variation of the system temperature or the electrolyte concentration.There is serious galvanic corrosion risk for corrosion-resisting aluminum alloy LB 733 which needs to be protected by appropriate galvanic corrosion control methods.