Study on the corrosion mechanism of the oxide scale on hot rolled steel in an atmospheric environment
| Autor: | Ma Hongchi, Fan Yi, Xuequn Cheng, Xiaogang Li, Cai Jiaxing, Dai Qinqin, Chen Linheng, Zhao Baijie |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scale (ratio) Scanning electron microscope General Chemical Engineering Metallurgy Oxide 02 engineering and technology Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Microstructure 01 natural sciences 0104 chemical sciences Corrosion chemistry.chemical_compound chemistry General Materials Science 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Anti-Corrosion Methods and Materials. 66:613-620 |
| ISSN: | 0003-5599 |
| Popis: | Purpose The purpose of this paper is to understand the process of failure of scale and the corrosion resistance of scale to the substrate in an atmospheric environment. Design/methodology/approach The corrosion behaviour of X65 pipeline steel with different types of oxide scale was analysed using the natural environment exposure corrosion test, scanning electron microscopy analysis, electrochemical corrosion polarization curve test and other methods in a warehouse environment. Findings The results of this research show that one type of oxide scale, which is rough, has an uneven microstructure, and exhibits weak adhesion to the matrix, does not protect the substrate from corrosion. Conversely, the uniform, dense oxide scale, which exhibits strong adhesion to the matrix, provides effective protection to the steel. However, as the corrosion develops, the corrosion rate of the substrate tends to accelerate, especially when the structure of the oxide scale is damaged to a certain extent. Originality/value The corrosion mechanism of the oxide scale on hot rolled steel in an atmospheric environment has been proposed. |
| Databáze: | OpenAIRE |
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