Adhesively bonded CFRP/Al joints: Influence of the surface pretreatment on corrosion during salt spray test

The objective of this study was to investigate the influence different surface pretreatments on aging behavior adhesively bonded carbon fiber reinforced polymers/Al joints in a standardized salt spray environment. Therefore, bonding surfaces were acetone-cleaned or laser-pretreated by near-infrared laser radiation. pretreated examined using optical microscopes, roughness measurements, and infiltration tests. Mechanical testing performed unaged state after five durations from 120 1440 h. specimens lose maximum 20% their initial average shear strength 22 MPa up In contrast, fracture patterns samples show corrosive degradation 720 h, indicating galvanic coupling crevice corrosion. This leads significant decrease 50% h aging. some strategies avoid contact corrosion via pretreatment joining process are presented additionally.