Strength Degradation Mechanism of CFRP and Aluminium Alloy Hybrid Bonded-Riveted Joints Under Salt Spray Environment

Hybrid bonded-riveted joint has poor corrosion resistance under salt spray environment, especially for dissimilar materials. The study investigates the strength degradation mechanism of carbon fiber reinforced polymer and aluminium alloy (CFRP-Al) hybrid bonded-riveted joints under salt spray environment, and it proposes a method to improve corrosion resistance of CFRP-Al hybrid bonded-riveted joints. The study found that the strength degradation of CFRP-Al hybrid joints under salt spray environment was mainly attributed to the decrease in bonding strength at the aluminum/adhesive interface. Comparison results further showed that the diffusion of corrosive medium along the aluminum/adhesive bonding interface caused a 33.3