Acta Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(5), 1609-1617 | DOI: 10.11118/actaun201664051609

Effect of Saline Environment on Mechanical Properties of Structural Adhesive Bonds

Miroslav Müller
Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16521 Prague 6 - Suchdol, Czech Republic

This study brings new pieces of knowledge about a utilization of an inorganic filler in an area of steel adhesive bonds exposed to a degradation environment. The filler in the form of glass beads with a fraction size 90 ± 20 μm was used within the research. The aim of the research was to evaluate an influence of the degradation environment on a strength of structural two-component epoxy adhesives and a composite material. A preparation of adhesive bonds and a process of testing of the adhesive bonds were in accordance with the modified standard ČSN EN 1465. The degradation environment in a form of 5 % saline solution was used within this experiment. Adhesive bonded testing samples were subjected to a cyclic loading of the saline solution. The adhesive bonds with the filler reached up to 16 % higher adhesive bond strength than the unfilled adhesive bonds. The bonds adhesive bonded with the tested composite adhesive better resisted to the degradation process of ca. 9 %. The cyclic exposure, i.e. dipping of the testing samples into the saline solution and consequent drying significantly decreases the strength of the adhesive bond (up to 67 % in 6 weeks).

Keywords: adhesive bond strength, glass beads, filler, saline solution, scanning electron microscopy (SEM), structural two-component epoxy, steel
Grants and funding:

Supported by Internal grant agency of Faculty of Engineering, Czech University of Life Sciences Prague (Research on mechanical properties of multi-component polymer systems during their preparation, processing and application, 2016:31140/1312/3109).

Prepublished online: October 31, 2016; Published: November 1, 2016  Show citation

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Müller, M. (2016). Effect of Saline Environment on Mechanical Properties of Structural Adhesive Bonds. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(5), 1609-1617. doi: 10.11118/actaun201664051609
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