In situ surface film evolution during Mg aqueous corrosion in presence of selected carboxylates
authors Maltseva, A; Lamaka, SV; Yasakau, KA; Mei, D; Kurchavov, D; Zheludkevich, ML; Lefevre, G; Volovitch, P
nationality International
journal CORROSION SCIENCE
author keywords Mg; In situ Raman spectroscopy; Glow discharge optical emission spectroscopy; ATR-FTIR; Organic inhibitors; Surface film
keywords RELATIVE INTENSITY CHANGES; COORDINATION POLYMERS; MAGNESIUM ALLOY; POSITIONAL FLUCTUATION; SALICYLATE INTERACTION; FREQUENCY-SHIFT; ANODE MATERIALS; MILD-STEEL; INHIBITION; ACIDS
abstract Mechanisms of inhibition of Mg aqueous corrosion in presence of chloride by sodium salicylate (Sal), 2,5-pyridinedicarboxylate (PDC) and fumarate (Fum) were studied by in situ Raman spectroscopy, ATR-FTIR, GD-OES and hydrogen collection. In situ detected surface films were composed by Mg(OH)(2) nano-crystals and included inhibitors. All carboxylates significantly modified Mg(OH)(2) growth kinetics as well as pevented chloride incorporation in the film. Vibrational spectra of the surface films demonstrated specific interactions between the carboxylates and the surface: adsorption of Sal and Fum on the oxide/hydroxide, precipitation of coordination polymer by PDC, dissolution of iron inclusions via formation of iron-Sal soluble complexes.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
isbn 1879-0496
year published 2020
volume 171
digital object identifier (doi) 10.1016/j.corsci.2020.108484
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000537624600004
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