Adesivos estruturais baseados em epóxi na indústria petroquímica: uma revisão

• Autor(a) principal: Moraes, Carlos Eduardo
• Data de Publicação: 2021
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/234902
• topic: Structural adhesives; Adhesive joints; Mechanical properties; Petrochemical industry; Adesivos estruturais; Juntas adesivadas; Propriedades mecânicas; Indústria petroquímica; Adesivos; Juntas (Engenharia); Resinas epóxi

One of the major problems faced by the petrochemical industry is the low durability of material joints, mostly metallic, caused by exposure to environmental conditions considered aggressive, such as ultraviolet (UV) radiation, temperature variations and high levels of humidity and salinity. As a result of this exposure, there is a weakening of the joints through the deterioration of the mechanical properties, both of components such as screws and rivets, and of the weld beads, considered conventional techniques in this sector of the chemical industry. Within this context, structural adhesives appear as an alternative in the union of these materials, promoting greater durability and predictability in the detection of fractures before reaching critical levels, compromising the structural integrity of the intended application. The objective of this work is to carry out a literature review analyzing the changes in the mechanical properties of joints of different types of materials through the use of structural adhesives based on epoxy to the detriment of the use of conventional techniques. From studies available in the literature, analyze the information considered useful to optimize the use of this technology in the petrochemical industry. Among the studies, analyze the main efforts suffered by the joints in applications within this industry through different test methods, such as lap shear test, DBC and ENF tests in the evaluation of the interlaminar fracture toughness in modes I and II, peel resistance test, or peel test, in addition to analysis with dynamic efforts involving temperature variation, such as dynamic-mechanical analysis (DMA), always evaluating the effect of aging caused by exposure to working conditions on the properties of the assessed joints. Studies available in the literature indicate that many other factors influence the durability of the joints, such as the design and selection of the most suitable materials for the application. The in-depth study of joints with structural epoxy adhesive can provide relevant information for the development of optimized joints, capable of promoting the use of this technology in critical applications, replacing conventional joining techniques.