Effects of anodizing surface treatment on the mechanical strength of aluminum alloy 5083 to fibre reinforced composites adhesive joints

In this study, the anodizing process based on the use of tartaric sulfuric acid solution (TSA) was carried out on metal substrate to evaluate for the first time its effect on the adhesion strength and corrosion resistance of aluminium alloy (i.e., AA5083) to fibre (i.e., basalt or glass) reinforced...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2021-07, Vol.108, p.102868, Article 102868
Main Authors: Fiore, V., Di Franco, F., Miranda, R., Santamaria, M., Badagliacco, D., Valenza, A.
Format: Article
Language:English
Subjects:
Adhesive joint
Adhesive joints
Adhesive strength
Aluminum base alloys
Anodizing
Basalt
Contact angle
Corrosion effects
Corrosion resistance
Corrosion resistant alloys
Coupling agents
Epoxy resins
Evaluation
Fiber composites
Fiber-matrix adhesion
Fourier transforms
Mechanical analysis
Morphology
Silane coupling agent
Silanes
Substrates
Sulfuric acid
Surface treatment
Tensile tests
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Summary:In this study, the anodizing process based on the use of tartaric sulfuric acid solution (TSA) was carried out on metal substrate to evaluate for the first time its effect on the adhesion strength and corrosion resistance of aluminium alloy (i.e., AA5083) to fibre (i.e., basalt or glass) reinforced composite adhesive joints for nautical applications. Furthermore, some TSA anodized samples were soaked in a NaOH solution to investigate the influence of this post-immersion step on the joint performances. With the aim to improve the fibre-matrix adhesion in the composite substrate thus further increasing the overall mechanical response of the joint, glass and basalt fibres were treated with a silane coupling agent solution. The corrosion behaviour of the aluminium alloy was studied by electrochemical techniques. Samples morphology was analysed by scanning electron microscopy, while the interaction between aluminium alloy substrate and epoxy resin was studied through contact angle analysis and resin uptake tests. The effectiveness of the silane treatment was examined by means of Fourier transform infrared spectroscopy and quasi-static tensile tests carried out on dry glass and basalt fabrics. The mechanical response of the resulting joints was evaluated by means of quasi-static tensile tests in accordance to ASTM D3528 standard.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2021.102868