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APPLICATION OF MATHEMATICAL STATISTICAL METHODS TO ELECTROCHEMICAL NOISE OF STRESS CORROSIONCRACKING |
QIAO Li-jie GAO Ke-wei CHU Wu-yang (Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083) |
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Abstract Electrochemical noises generated during stress corrosion cracking (SCC) of 304 stainless steel and α-brass were studied. SCC noise pattern showed common characteristics, i.e., the quick drop and slow recovery of the potential. The quick drop corresponded to a crack initiation and/or discontinuous propagation where fresh metal surface was exposed. The slow recovery corresponded to repassivation process of the exposed bare metal. For random noises, the rates of potential rise and drop were similar. The frequency of the noise generated during SCC increased with the increase in the applied stress. SCC initiation could be monitored and determined according to the noise characteristic and distribution. Mathematical treatments of standard deviation and power spectrum density (PSD) made the determination easier and realistic. But the background shift of the potential must be eliminated before the process. Standard deviation was more convenient and effective than PSD in the practice application.
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Received: 25 August 1998
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Cite this article:
QIAO Li-jie GAO Ke-wei CHU Wu-yang (Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083). APPLICATION OF MATHEMATICAL STATISTICAL METHODS TO ELECTROCHEMICAL NOISE OF STRESS CORROSIONCRACKING. J Chin Soc Corr Pro, 1998, 18(4): 263-268.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I4/263
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1 Newman R C, Sieradzki K. Scripta Metall. 1983, 17:621 2 Loto C A, Cottis R A. Corrosion 1987, 43:499 3 Loto C A, Cottis R A. Corrosion 1989, 45:136 4 Cottis R A, Loto C A. Corrosion 1990, 46:12 5 Inoue H, Iwawaki H, Yamakawa K. Mater. Sci. Eng. 1995, A198:225 6 Yamakawa K, Inoue H. Corros. Sci. 1992, 31:503 7 乔利杰,高克玮,褚武扬.金属学报,待发表 8 Wells D B, Stewart J, Davudson R, Scott P M, Willams D E. Corros. Sci. 1992, 33:39 9 Stewart J, Wells D B, Scott P M, Willams D E. Corros. Sci. 1992, 33:73 10 Gonzalez-Rodriguez J G, Salinas V M, Ramirez-Montano J M. Corros. Rev. 1996, 14:309 11 Benzaid A, Gabrielli C, Huet F, Jerome M, Wenger F. Material Science Forum 1992, 111-112:167 |
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