The car industry uses adhesive bonding for bodywork assembly and, in many cases, application of adhesives is effected without prior degreasing of the steel sheet. As a consequence, oil originally at the steel/adhesive interface may potentially modify both initial and long-term behavior. With the aim to follow any displacement of this oil in the interphase metal/oil/adhesive during the formation of the assemblage and its influence on behavior, IR spectroscopy was used and, in particular, a heated ATR (attenuated total reflection) cell was developed. The technique allows evolution of chemical composition to be followed as a function of the time during the curing process of the adhesive (appearance or disappearnace of chemical species, crosslinking, etc.) and over a depth of several microns. As a consequence, a better understanding of behavior and localization of oil within a structural joint was obtained and is discussed.
Adhesion of oil-covered substrates: Behaviour in the interphase during cure
1999
6 Seiten, 6 Bilder, 1 Tabelle, 11 Quellen
Conference paper
English
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