Study on Stress Corrosion Behavior of X100 and X80 Pipeline Steels with Applied Potential
| Autor: | HUANG Tao, GUO Jie, WEI Kai-hua, CHEN Jia-qi, XUE Hui-yong, WANG Xiao-feng |
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| Jazyk: | čínština |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Cailiao Baohu, Vol 56, Iss 3, Pp 28-34 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1001-1560 54720486 |
| DOI: | 10.16577/j.issn.1001-1560.2023.0056 |
| Popis: | Taking X100 and X80 pipeline steels as research objects，their stress-strain curves in air and under different applied potentials were obtained through the slow strain rate tensile test (SSRT).The stress corrosion sensitivity analysis showed that the applied potential had a significant effect on the SCC sensitivity and corrosion cracking mechanism of X100 and X80 pipeline steels in 3.5%NaCl neutral solution.Under the same stress corrosion conditions，the SCC sensitivity of X100 pipeline steel was lower than that of X80 pipeline steel.The characteristics and differences of the corrosion resistance of X100 and X80 pipeline steels were analyzed by combing the observation of fracture morphology and fast/slow scan tests of polarization curves，the stress corrosion mechanism type of X100 and X80 pipeline steel materials under different applied potential conditions could be obtained，when the applied potential was higher than -395 mV，the metal was in the state of activation dissolution；when the applied potential was -395～-462 mV(X80 steel) or -395～-504 mV(X100 steel)，the mechanisms were membrane crackinganodic dissolution(AD) and hydrogen induced crack.If the applied potential further decreased，the mechanism was hydrogen induced crack. |
| Databáze: | Directory of Open Access Journals |
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