The introduction of adhesive bonding in the automotive industry is one of the key enabling technologies for the production of aluminium closures and all-aluminium car body structures. One of the main concerns limiting the use of adhesive joints is the durability of these system when exposed to service conditions. The present article primarily focuses on the different research works carried out for studying the effect of water, corrosive ions and external stresses on the performances of adhesively bonded joint structures. Water or moisture can affect the system by both modifying the adhesive properties or, more importantly, by causing failure at the substrate/adhesive interface. Ionic species can lead to the initiation and propagation of filiform corrosion and applied stresses can accelerate the detrimental effect of water or corrosion. Moreover, in this review the steps which the metal undergoes before being joined are described. It is shown how the metal preparation has an important role in the durability of the system, as it modifies the chemistry of the substrate’s top layer. In fact, from the adhesion theories discussed, it is seen how physical and chemical bonding, and in particular acid-base interactions, are fundamental in assuring a good substrate/adhesive adhesion.

中文翻译：

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汽车工业中铝胶接缝的研究进展

在汽车工业中引入粘接剂是铝封闭件和全铝车身结构生产的关键技术之一。限制粘合接头使用的主要问题之一是这些系统在使用条件下的耐久性。本文主要侧重于进行不同的研究工作，以研究水，腐蚀性离子和外部应力对粘结接头结构性能的影响。水或湿气会通过改变粘合性能，或更重要的是，引起基材/粘合剂界面的破坏而影响系统。离子物质会导致丝状腐蚀的发生和蔓延，施加的应力会加速水或腐蚀的有害作用。此外，在这篇综述中，描述了金属在连接之前要经历的步骤。显示了金属制剂如何在系统的耐久性中起重要作用，因为它改变了基材顶层的化学性质。实际上，从讨论的粘合理论可以看出，物理和化学键合，尤其是酸碱相互作用，对于确保良好的基材/粘合剂粘合性至关重要。