| Autor: |
Eun Hye Hwang, Jin Sung Park, Hwan Goo Seong, Sung Jin Kim |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 8, Iss 1, Pp 1419-1426 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2018.10.007 |
| Popis: |
The nature of a passive film formed on high-strength carbon steel and degradation of its passivity in acidic phosphate solutions were characterized by X-ray photoelectron spectroscopy and electrochemical polarization measurements. This study reveals that the steels show typical passivation and localized corrosion behaviors. The passivating film is composed mainly of FePO4·2H2O at a lower potential of 0.4 VSCE, but the major component of the film is changed to γ-Fe2O3 at a higher potential of 1.1 VSCE. At more than 1.5 VSCE, a number of shallow pores and/or pits were observed primarily at coarse-sized second phase particles. The four-point bending test suggested that the pre-existed pits/pores act as stress intensifiers under the subsequently applied tensile loading condition, resulting in higher anodic dissolution rates and lower resistance to stress corrosion cracking (SCC). Keywords: Carbon steels, Corrosion, Surface film, Phosphate solution |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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