Quantitative characterization of the atomic-scale structure of oxyhydroxides in rusts formed on steel surfaces

Journal Article · Tue Nov 15 04:00:00 EST 2005 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2005.06.004· OSTI ID:20833171

Saito, M ^[1]; Suzuki, S ^[2]; Kimura, M ^[3]; Suzuki, T ^[3]; Kihira, H ^[3]; Waseda, Y ^[1]

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1. School of Health Science, Faculty of Medicine, Niigata University, Niigata 951-8518 (Japan)
2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)
3. Technical Development Bureau, Nippon Steel Corporation, Futtsu 293-8511 (Japan)

Quantitative X-ray structural analysis coupled with anomalous X-ray scattering has been used for characterizing the atomic-scale structure of rust formed on steel surfaces. Samples were prepared from rust layers formed on the surfaces of two commercial steels. X-ray scattered intensity profiles of the two samples showed that the rusts consisted mainly of two types of ferric oxyhydroxide, {alpha}-FeOOH and {gamma}-FeOOH. The amounts of these rust components and the realistic atomic arrangements in the components were estimated by fitting both the ordinary and the environmental interference functions with a model structure calculated using the reverse Monte Carlo simulation technique. The two rust components were found to be the network structure formed by FeO{sub 6} octahedral units, the network structure itself deviating from the ideal case. The present results also suggest that the structural analysis method using anomalous X-ray scattering and the reverse Monte Carlo technique is very successful in determining the atomic-scale structure of rusts formed on the steel surfaces.

• OSTI ID: 20833171
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 4-5 Vol. 55; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
LAYERS
MONTE CARLO METHOD
STEELS
SURFACES
X-RAY DIFFRACTION