用小波分析研究氮对不锈钢点蚀影响的电化学噪声

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-07-09 DOI:10.1080/1478422X.2022.2096323

N. Upadhyay, A. R. Ravi Shankar, S. Singh, B. Anandkumar

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引用次数: 2

摘要

摘要采用电化学噪声（EN）方法，在0.01M FeCl3中研究了氮对点蚀过程的影响 h，采样频率为1 赫兹。使用小波分析对含有不同量氮（0.07、0.12、0.14和0.22wt%氮）的316L SS四种合金的EN信号进行了研究。利用能量分布图（ED）和部分信号标准差图（SDPS），研究了不同含氮316L不锈钢的一次腐蚀过程。ED图显示，随着合金中氮百分比的增加，低频信号的能量降低，表明长时间瞬态受到抑制。SDPS数据显示，随着氮含量的增加，凹坑密度有所下降。对于含有0.07、0.11、0.14和0.22wt%氮的试样，测得凹坑密度为439 ± 3833 ± 6122 ± 6和108 ± 4个坑 mm−2。

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Electrochemical noise studies on the effect of nitrogen on the pitting corrosion of stainless steel using wavelet analysis

ABSTRACT The effect of nitrogen on the pitting process is investigated using the electrochemical noise (EN) approach in 0.01 M FeCl3 for 24 h at a sampling frequency of 1 Hz. The EN signals were investigated using wavelet analysis on four alloys of 316L SS containing varying quantities of nitrogen (0.07, 0.12, 0.14 and 0.22 wt-% nitrogen). Using an energy distribution (ED) and standard deviation of partial signal (SDPS) plot, the primary corrosion process in various nitrogen-containing 316L SS was found. The ED plot showed that as the nitrogen percentage in the alloy increased, the energy of the low-frequency signal decreased, indicating that long-time transients were suppressed. The SDPS figure revealed a drop in pit density as nitrogen levels increased. For specimens containing 0.07, 0.11, 0.14 and 0.22 wt-% nitrogen, the pit density was determined to be 439 ± 8, 383 ± 6, 212 ± 6 and 108 ± 4 pits mm−2, respectively.

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.