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

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

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Article in Materials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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7 authors.

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

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

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

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

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

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

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

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

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.

Indexed as

316L stainless steelpotential step methodquality of passivationthree-electrodetime-domain impedance

Identifiers

PMID40731487

DOI10.3390/ma18143276

PMCPMC12298384

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