Is gold always chemically passive? Study and comparison of the epoxy-amine/metals interphases - Archive ouverte HAL Access content directly
Journal Articles Applied Surface Science Year : 2008

Is gold always chemically passive? Study and comparison of the epoxy-amine/metals interphases

Abstract

When epoxy-amine liquid mixtures are applied onto metallic substrates (such as Al, Ti, Sn, Zn, Fe, Cr, Cu, Ag, Ni, and Au), concomitant amine chemisorption and metallic surface dissolution occur, leading to organo-metallic complex formation. The interphase formation was studied, using two different amines as hardener (IsoPhoroneDiAmine and EthyleneTriAmine). If the complex concentration within the liquid amine or epoxyamine prepolymer was higher than its solubility limit, the complexes will crystallize. Sharp needle-like crystals were only observed with metal-IPDA organo-metallic complexes. A lot of metals are widely used as reactive substrates with gold as a reference, which is considered chemically inert. It is misleading, since it will be shown in this article that gold reacts with amine, just as the other metals.
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Dates and versions

hal-00867043 , version 1 (27-09-2013)

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Maëlenn Aufray, Alain André Roche. Is gold always chemically passive? Study and comparison of the epoxy-amine/metals interphases. Applied Surface Science, 2008, vol. 254, pp. 1936-1941. ⟨10.1016/j.apsusc.2007.07.192⟩. ⟨hal-00867043⟩
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