Delamination of filler-incorporated automotive epoxy adhesives from different steel substrates upon exposure to distilled water and NaCl solutions under applied bending stresses

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Delamination of filler-incorporated automotive epoxy adhesives from different steel substrates upon exposure to distilled water and NaCl solutions under applied bending stresses

Tai, R.C.L. / Szklarska-Smialowska, Z.

Upon exposure to corrosive environments, adhesives can deteriorate, and a loss of adhesion between the adhesives and the metal adherends can occur. The durability and strength of the structural adhesive/metal bonding are critically dependent on the interaction between the adhesive and the metal substrate. Delamination of four filler-incorporated automotive epoxy adhesives from five different steel substrates was studied using a three-point bending device. The bent specimens were exposed to destilled water and NaCl solutions with different concentrations from 1-5 weeks. It was found that the degree of adhesive delamination increased with the concentration of the NaCl solution, and with the magnitude of the applied bending stresses. The harder the adhesives, or the higher the content of the fillers in the adhesives, the lower was the degree of the adhesive delamination. In addition, the rank of the steel substrates in terms of their bonding resistance against adhesive delamination was determined. It is believed that the adhesion between the adhesives and the steel substrates is governed by the surface roughness of the steel substrates.

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Document information

Title :

Delamination of filler-incorporated automotive epoxy adhesives from different steel substrates upon exposure to distilled water and NaCl solutions under applied bending stresses

Additional title:

Ablösung füllstoffhaltiger, im Automobilbau verwendeter Epoxidharz-Klebstoffe von verschiedenen Stahlunterlagen unter Einwirkung von destilliertem Wasser und NaCl-Lösungen unter ausgeübten Biegespannungen

Contributors:

Tai, R.C.L. (author) / Szklarska-Smialowska, Z. (author)

Published in:

Journal of Materials Science ; 31 , 7 ; 1925-1935

Publication date :

1996

Size :

11 Seiten, 6 Bilder, 3 Tabellen, 27 Quellen

ISSN :

0022-2461

DOI :

https://doi.org/10.1007/BF00372209