Abstract This study aims to evaluate detailed corrosion characteristics and mechanical performance of CFRP/Al bonded and hybrid bonded-riveted joints subjected to cyclic salt mist-dry-wet environments. Results indicated that joint strength of both bonded and hybrid joints progressively declined with increased ageing cycles with up to 40.4% and 31.9% degradation, respectively. Compared with purely bonded joints, hybrid joints presented superior mechanical properties and less degradation rate. Light fiber tearing failure and cohesive failure predominated for less aged joints, while more apparent interface failure and accumulated corrosion products were observed at higher ageing cycles. The main corrosion mechanism was the pitting corrosion on the aluminum substrate surface, which further led to the formation of accumulated corrosion products and disbonding of the aluminum/adhesive interface. Rivet body of hybrid joints remained pristine and rivet heads experienced severe galvanic corrosion, while these corrosion features generated limited impact on joint performance.

中文翻译：

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CFRP/Al 结构接头在加速循环腐蚀环境中的耐久性和机械性能

摘要 本研究旨在评估CFRP/Al 结合和混合结合铆接接头在循环盐雾-干-湿环境下的详细腐蚀特性和机械性能。结果表明，粘合接头和混合接头的接头强度随着老化周期的增加而逐渐下降，分别下降 40.4% 和 31.9%。与纯粘结接头相比，混合接头具有优越的机械性能和较低的退化率。轻纤维撕裂失效和内聚失效在老化程度较低的接头中占主导地位，而在较高的老化周期中观察到更明显的界面失效和累积腐蚀产物。主要腐蚀机理是铝基体表面的点蚀，这进一步导致累积腐蚀产物的形成和铝/粘合剂界面的脱粘。混合接头的铆钉体保持原始状态，铆钉头经历了严重的电偶腐蚀，而这些腐蚀特征对接头性能的影响有限。