Influence of 1,2-diaminoethane on the mechanism of aluminium corrosion in sulphuric acid solutions
(2010) Corrosion Science : the journal on environmental degradation of materials and its control — Vol. 52, n° 10, p. 3405-3412 (2010)
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- Abstract
- The influence of 1,2-diaminoethane (DAE) on aluminium corrosion in H2SO4 solutions (pH 3) was investigated. In pure H2SO4, rapid uniform corrosion is followed by inhibition due to the formation of stable Al-sulphate binuclear bidentate metal bound surface complexes via a ligand exchange mechanism with two neighbouring Al-OH2+ sites. Metastable pitting is also observed. DAE acts as a strong corrosion inhibitor for both uniform and localised corrosion, due to the formation of Al-DAE monodentate hydrogen-bond surface complexes either by direct adsorption of the protonated molecule on Al-OH sites or via a ligand exchange mechanism with the proton of an Al-OH2+ site. (C) 2010 Elsevier Ltd. All rights reserved.
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Mercier, D., Herinx, M., & Barthes-Labrousse, M.-G. (2010). Influence of 1,2-diaminoethane on the mechanism of aluminium corrosion in sulphuric acid solutions. Corrosion Science : the journal on environmental degradation of materials and its control, 52(10), 3405-3412. https://doi.org/10.1016/j.corsci.2010.06.022 (Original work published 2010)