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基于便携式探头测量的电位阶跃瞬态对316L不锈钢钝化质量的时域阻抗分析

Time-Domain Impedance Analysis on Passivation Quality of 316L Stainless Steel with Portable-Probe-Measured Potential Step Transient.

作者信息

Li Haobin, Jiang Bufan, Cheng Chi, Cheng Congqian, Wang Qibo, Cao Tieshan, Zhao Jie

机构信息

School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China.

出版信息

Materials (Basel). 2025 Jul 11;18(14):3276. doi: 10.3390/ma18143276.

DOI:10.3390/ma18143276
PMID:40731487
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12298384/
Abstract

To achieve rapid detection of stainless steel passivation quality, a time-domain impedance method was investigated based on a potential step transient with a portable three-electrode probe. A comparison of the effects of signal analysis and transient parameters was conducted, and the results were compared with those obtained in a bulk solution with a general three-electrode system. The measured transient current with the probe offered a higher signal-to-noise ratio, with minimal deviation from the frequency-domain impedance observed at a step amplitude of 0-100 mV. Measurements using the three-electrode probe under different stabilization times indicated that, after 30 s of stabilization, the measurement deviation was less than 1%, enabling a rapid assessment. Comparative testing of surfaces with varying passivation quality revealed that the pitting potential increases with increasing time-domain impedance, demonstrating the method's capability to distinguish passivated surfaces with different corrosion resistances.

摘要

为实现对不锈钢钝化质量的快速检测，基于带有便携式三电极探头的电位阶跃瞬态研究了一种时域阻抗方法。进行了信号分析和瞬态参数影响的比较，并将结果与使用普通三电极系统在本体溶液中获得的结果进行了比较。使用探头测量的瞬态电流具有更高的信噪比，在0 - 100 mV的阶跃幅度下与频域阻抗的偏差最小。在不同稳定时间下使用三电极探头进行的测量表明，稳定30 s后，测量偏差小于1%，能够进行快速评估。对具有不同钝化质量的表面进行的对比测试表明，点蚀电位随时间域阻抗的增加而增加，证明了该方法区分具有不同耐腐蚀性的钝化表面的能力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdff/12298384/22406ede4d6d/materials-18-03276-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdff/12298384/4a50c363d0b5/materials-18-03276-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdff/12298384/8eeefe91132f/materials-18-03276-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdff/12298384/22406ede4d6d/materials-18-03276-g013.jpg

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