Atomic-scale structure and morphology of ferric oxyhydroxides formed by corrosion of iron in various aqueous media

被引：15
作者：
Kwon, Sang-Koo
Suzuki, Shigeru
Saito, Masatoshi
Waseda, Yoshio
机构：
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Niigata Univ, Fac Med, Sch Hlth Sci, Niigata 9518518, Japan
来源：
CORROSION SCIENCE | 2006年 / 48卷 / 11期
基金：
日本学术振兴会;
关键词：
iron; XRD; TEM; spectroscopy; rust;
D O I：
10.1016/j.corsci.2006.01.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fine particles of corrosion products consisting of one kind of ferric oxyhydroxide, either gamma-FeOOH (lepidocrocite) or alpha-FeOOH (goethite), were directly prepared by dipping pure iron into aqueous solutions containing sodium chloride, sodium sulfate, or their mixed salts with sodium bicarbonate. Quantitative X-ray structural analysis using an in-house X-ray diffraction apparatus has been used for characterizing the atomic-scale structure of these ferric oxyhydroxide particles. The morphology of the gamma-FeOOH and alpha-FeOOH particles was observed by transmission electron microscopy (TEM), and their bonding structures were analyzed using Fourier transform infrared spectroscopy (FT-IR). The realistic atomic-scale structures in the gamma-FeOOH and alpha-FeOOH particles were estimated by fitting the interference functions with the help of the reverse Monte Carlo (RMC) simulation technique. The results showed that the linkages of fundamental FeO6 Octahedral units in the particles were deviated from the ideal crystal structure. The structural deviation is believed to be due to the incorporation of foreign anions during the formation of these particles in the aqueous solutions. The resultant atomic-scale structures in the gamma-FeOOH and alpha-FeOOH particles were correlated with their morphology and bonding structure. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3675 / 3691
页数：17
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