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http://hdl.handle.net/10773/37304
Title: | In situ surface film evolution during Mg aqueous corrosion in presence of selected carboxylates |
Author: | Maltseva, A. Lamaka, S.V. Yasakau, K.A. Mei, Di Kurchavov, D. Zheludkevich, M.L. Lefèvre, G. Volovitch, P. |
Keywords: | Mg In situ Raman spectroscopy Glow discharge optical emission spectroscopy ATR-FTIR Organic inhibitors Surface film |
Issue Date: | 15-Jul-2020 |
Publisher: | Elsevier |
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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/37304 |
DOI: | 10.1016/j.corsci.2020.108484 |
ISSN: | 0010-938X |
Appears in Collections: | CICECO - Artigos DEMaC - Artigos |
Files in This Item:
File | Description | Size | Format | |
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In situ surface film evolution during Mg aqueous corrosion in presence.pdf | 4.25 MB | Adobe PDF | View/Open |
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