Nanostructure of Protective Rust Layer on Weathering Steel Examined Using Synchrotron Radiation X-rays
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- Yamashita Masato
- Division of Mechanical Engineering, Graduate School of Engineering, University of Hyogo
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- Konishi Hiroyuki
- Synchrotron Radiation Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute
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- Mizuki Jun'ichiro
- Synchrotron Radiation Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute
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- Uchida Hitoshi
- Division of Mechanical Engineering, Graduate School of Engineering, University of Hyogo
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Abstract
The X-ray absorption fine structure (XAFS) spectrum of pure goethite around the Fe K absorption edge and that of the protective rust layer formed on weathering steel exposed for 17 years in an atmospheric environment around the Cr K edge, have been examined using synchrotron radiation X-rays. It was found that the rust layer on the weathering steel mainly consisted of Cr-goethite. By examining the fine structure at the Cr K edge and the Fe K edge, we concluded that Cr3+ in the rust layer is coordinated with O2− and is positioned in the double chains of vacant sites in the network of FeO3(OH)3 octahedra in the goethite crystal. This Cr3+ site indicates that the protective effect of the rust layer is due to the dense aggregation of fine crystals of Cr-goethite with cation selectivity.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 45 (6), 1920-1924, 2004
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282679227068544
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- NII Article ID
- 130004452499
- 10013136113
- 30018850558
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- NII Book ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD2cXlvVanu7g%3D
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 6981294
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed