Detection of SCC of 304 NG stainless steel in an acidic NaCl solution using electrochemical noise based on chaos and wavelet analysis
- Авторлар: Wei Y.1, Xia D.1, Song S.1
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Мекемелер:
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering
- Шығарылым: Том 52, № 6 (2016)
- Беттер: 560-575
- Бөлім: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/187929
- DOI: https://doi.org/10.1134/S1023193516060124
- ID: 187929
Дәйексөз келтіру
Аннотация
The stress corrosion crack (SCC) of 304 nuclear grade (NG) stainless steel (SS) in 0.5 mol/L NaCl+1.5 mol/L H2SO4 was monitored using electrochemical noise (EN) based on chaos theory, statistics and wavelet analysis. The results indicated that the SCC process was divided into three stages according to the transient features in the EN. In the beginning, compared with the sample without applied stress, the enhanced fluctuation amplitude in the electrochemical current noise (ECN) of the stressed samples was attributed to stress-enhanced pitting corrosion and uniform corrosion; then the fluctuations of ECN for all the samples decreased due to a coverage by the corrosion products; however, the ECN fluctuations of stressed sample were larger than the unstressed sample, suggesting that the stress enhanced the SCC initiation and propagation. Chaos analysis revealed that the correlation dimensions increase from 2.1 to 2.5 during the corrosion process, and the applied stress seems increase the complexity and uncertainty of the ECN signal.
Авторлар туралы
Yong-Jia Wei
Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering
Email: dahaixia@tju.edu.cn
ҚХР, Tianjin, 300072
Da-Hai Xia
Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering
Хат алмасуға жауапты Автор.
Email: dahaixia@tju.edu.cn
ҚХР, Tianjin, 300072
Shi-Zhe Song
Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering
Email: dahaixia@tju.edu.cn
ҚХР, Tianjin, 300072