Published October 2010 | Version v1
Journal article Metadata-only

Influence of 1,2-diaminoethane on the mechanism of aluminium corrosion in sulphuric acid solutions

Creators

  • 1. Univ. Catholique de Louvain (UCL), Division of Materials and Process Engineering, Place Sainte Barbe 2, B-1348 Louvain La Neuve (France)
  • 2. CNRS, Centre d'Etudes de Chimie Metallurgique, 15 rue Georges Urbain, F-94407 Vitry Cedex (France)
  • 3. CNRS, Orsay F-91405 (France)
  • 4. Univ. Paris-Sud, Institut de Chimie Moleculaire et Materiaux d'Orsay, Laboratoire d'Etude des Materiaux Hors Equilibre, UMR 8182, F-91405 Orsay Cedex (France)

Description

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.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.corsci.2010.06.022

Additional details

Identifiers

DOI
10.1016/j.corsci.2010.06.022;
PII
S0010-938X(10)00329-X;

Publishing Information

Journal Title
Corrosion Science
Journal Volume
52
Journal Issue
10
Journal Page Range
p. 3405-3412
ISSN
0010-938X
CODEN
CRRSAA

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42012786
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ADSORPTION; ALUMINIUM; AMINES; CORROSION INHIBITORS; ION EXCHANGE; PH VALUE; PITTING CORROSION; SOLUTIONS; SULFATES; SULFURIC ACID; SURFACES; X-RAY PHOTOELECTRON SPECTROSCOPY
Descriptors DEC
CHEMICAL REACTIONS; CORROSION; DISPERSIONS; ELECTRON SPECTROSCOPY; ELEMENTS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; METALS; MIXTURES; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOTOELECTRON SPECTROSCOPY; SORPTION; SPECTROSCOPY; SULFUR COMPOUNDS

Optional Information

Copyright
Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.