Oxidation of chukanovite (Fe2(OH)2CO3): Influence of the concentration ratios of reactants

被引：11
作者：
Azoulay, I. [1 ]
Remazeilles, C. [1 ]
Refait, Ph. [1 ]
机构：
[1] Univ La Rochelle, CNRS, UMR 7356, Lab Sci Ingn Environm LaSIE, F-17042 La Rochelle 01, France
来源：
CORROSION SCIENCE | 2015年 / 98卷
关键词：
Iron; Steel; Rust; IR spectroscopy; Pourbaix diagram; X-RAY-DIFFRACTION; LOW-CARBON STEEL; CORROSION PRODUCT; FERROUS HYDROXIDE; LEPIDOCROCITE GAMMA; GOETHITE ALPHA; AQUEOUS-MEDIA; CO2; CORROSION; GREEN RUST; IRON;
D O I：
10.1016/j.corsci.2015.06.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation of aqueous suspensions of chukanovite (Fe-2(OH)(2)CO3) obtained by mixing NaOH, FeCl2 and Na2CO3 solutions was studied for various [Fe2+]/[OH-] and [CO32-]/[OH-] concentration ratios. The redox potential of a platinum electrode immersed in the suspension was monitored during the oxidation process which reveals the presence of a plateau corresponding to equilibrium conditions between chukanovite and a poorly crystallized Fe(III) oxyhydroxide. The end products were characterized by Infrared spectroscopy and X-ray diffraction. Carbonate favoured the formation of goethite while Fe-aq(2+) favoured lepidocrocite. This effect is mainly due to the influence of these species on the pH of the solution. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：634 / 642
页数：9
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