Correlation between Corrosion Rate and Composition of Crystalline Corrosion Products Formed on Weathering Steels
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- Kamimura Takayuki
- Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
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- Yamashita Masato
- Department of Mechanical Engineering, Faculty of Engineering, Himeji Institute of Technology
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- Uchida Hitoshi
- Department of Mechanical Engineering, Faculty of Engineering, Himeji Institute of Technology
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- Miyuki Hideaki
- Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd.
Bibliographic Information
- Other Title
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- 耐候性鋼上に生成した結晶性さびの組成と腐食速度との相関
- タイコウセイ コウ ジョウ ニ セイセイ シタ ケッショウセイサビ ノ ソセイ ト フショク ソクド ト ノ ソウカン
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Abstract
The correlation between corrosion rate and compositions of crystalline corrosion products formed on weathering steels exposed to different amount of air-borne sea salt particles has been investigated by the X-ray diffraction method. The mass ratio (α⁄γ) of crystalline α-FeOOH to γ-FeOOH, in the rust formed on the weathering steels exposed at an industrial environment increases with an increase in exposure duration. The ratio α⁄γ is closely related to the corrosion rate in environments when the amount of air-borne salt is less than 0.2 mg NaCl/dm2/day. However this is not the case in seaside environments with higher amount of air-borne salts. The mass ratio (α⁄γ*) of crystalline α-FeOOH to the total mass of γ-FeOOH, β-FeOOH and Fe3O4, in the rust formed on the weathering steels is related to the corrosion rate even in seaside environments certainly more than 0.2 mg/dm2/day of air-borne sea salt particles. When the ratio α⁄γ* is more than 1, the higher corrosion rate more than 0.01 mm/y is not observed. The ratio α⁄γ* is expected to be an index for evaluating the corrosion resistance of the weathering steels even in atmosphere containing higher salt content.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 65 (10), 922-928, 2001
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
- 1390282681468209280
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- NII Article ID
- 130007342094
- 10007258917
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
- http://id.crossref.org/issn/00214426
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- NDL BIB ID
- 5952652
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed