Investigation of Rust Layer Formed on Weathering Steel Coated with a Surface Treatment Promoting Protective Rust Formation
| Autor: | Norio Wagure, Takayuki Kamimura, Kazuyuki Kashima, Hideaki Miyuki, Katsuya Nakahara, Ryuichi Ando, Takashi Doi, Shuichi Hara |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Weathering Weathering steel engineering.material Condensed Matter Physics Rust Corrosion symbols.namesake Mechanics of Materials Mössbauer spectroscopy symbols engineering General Materials Science Raman spectroscopy Exposure duration Layer (electronics) |
| Zdroj: | Journal of the Society of Materials Science, Japan. 56:1035-1041 |
| ISSN: | 1880-7488 0514-5163 |
| DOI: | 10.2472/jsms.56.1035 |
| Popis: | The rust layer formed on the weathering steels coated with a surface treatment promoting protective rust formation exposed at a coastal region containing 0.4mg/dm2/day of air-borne salt particles for 9 years has been investigated by means of X-ray diffraction, Raman spectroscopy, Electron probe micro-analysis and Mossbauer spectroscopy. In the surface treatment, Cr2(SO4)3 is contained to form the protective rust layer. Corrosion loss vs. time curve of surface treated weathering steels follows Y = AXB type function, where X is the exposure duration, Y is the corrosion loss, A and B are the constants. The surface of the treated weathering steels were covered with triple layers ; outer rust layer, surface treatment film and inner rust layer. The outer rust layer consisted of mainly β-FeOOH, and the inner one mainly α-FeOOH. Cr enrichment was observed in the inner rust layer. It can be said that the surface treatment works well to promote the formation of Cr-containing α-FeOOH layer formed on weathering steel. |
| Databáze: | OpenAIRE |
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