Study on the influence of water ingress on the interface of high strength zinc coated steels and epoxy adhesives

Borges, C.S.P.; Sousa, J.D.P.; Marques, E.A.S.; Carbas, R.J.C.; Chaleix, D.; Gilbert, F.; Pirart, J.; Rachiele, L.; Laffineur, F.; da Silva, L.F.M.

doi:10.1016/j.ijadhadh.2023.103595

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…However, these superior properties have not been sufficiently proven by third-party studies yet. While many studies focused on the durability of various adhesives in metal joints, e.g., [3][4][5][6], only several of them were focused on the adhesive tapes and their specialties-for example, in a failure mode.…”

Section: Introductionmentioning

confidence: 99%

Water Resistance of Acrylic Adhesive Tapes for Rooftop Fastening

Machalická,

Sejkot,

Vokáč

et al. 2024

Buildings

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Rooftop solar modules are usually held in place by racks or frames that are mechanically attached to a roof structure and/or by heavyweight, ballasted footing mounts. These mounts ensure that the panel system remains in position against wind load. However, mechanical connectors create penetrations into the water-resistant layer of the roof, whereas ballasted footing mounts cause a significant additional load on the load-bearing structure of roof. For these reasons, adhesive connection seems to be a beneficial solution. Acrylic adhesive tapes, marked as VHBTM, may provide sufficient strength, and they have no need for mechanical fasteners or ballast. Acrylic adhesive tapes also provide a comfortable, fast, and efficient bonding process with no curing compared to liquid adhesives. On the other hand, resistance to water at load-bearing joints has not been sufficiently studied yet and could be critical for connections exposed to the outdoor environment. The present study aims at the determination of water resistance and durability of the VHBTM tapes from the GPH series, which are typically used to bond a variety of substrates including many metals. The mechanical properties and failure modes are compared for the specimens before and after a 21-day immersion in water. A significant reduction in strength was observed, depending on the substrate material. The study of chemical changes in the acrylic tape and in its leachate through infrared spectroscopy (FT-IR), X-ray fluorescence, and X-ray diffraction analyses clarified the reduction in mechanical properties. The selected VHBTM tape demonstrated strong resistance to the effects of water. However, the overall strength of the joint after immersion was significantly impacted by the decrease in adhesion to a specific substrate.

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Section: Introductionmentioning

confidence: 99%

Water Resistance of Acrylic Adhesive Tapes for Rooftop Fastening

Machalická,

Sejkot,

Vokáč

et al. 2024

Buildings

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Characterization of Epoxy Adhesive for Marine Applications

Rodríguez-Dopico,

Álvarez García,

Tarrío-Saavedra

2024

Oceans

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The shipping industry faces the challenge of expanding its capabilities and mitigating its environmental impact. The utilization of adhesive bonding techniques has the potential to facilitate the construction of lighter ships with a reduced carbon footprint. In this work, a complete methodology has been established to study the properties of an adhesive bond between naval steel and the behavior of the bulk adhesive when introduced into seawater. Thermogravimetric analysis (TGA) has been used to determine the thermal properties. Single-lap-joint and tensile tests have been performed showing the negative influence of temperature on the mechanical properties. Seawater absorption has been studied by gravimetric tests. Differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and mechanical bulk tests have been carried out before and after aging. The water absorption is Fickian, and when a constant load is applied, the absorption occurs faster and in greater quantity, decreasing the stiffness and strength. An increase in the glass transition temperature was observed in the absence of a load, with no discernible change upon the application of load condition. Also, aged specimens with constant load exhibited a reduction in water content. These phenomena may be attributed to several diffusion processes.

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Study on the influence of water ingress on the interface of high strength zinc coated steels and epoxy adhesives

Cited by 2 publications

References 21 publications

Water Resistance of Acrylic Adhesive Tapes for Rooftop Fastening

Water Resistance of Acrylic Adhesive Tapes for Rooftop Fastening

Characterization of Epoxy Adhesive for Marine Applications

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