Corrosion Electrochemistry with a Segmented Array Bipolar Electrode

Yiqi Zhou; Nicholas Stevens; Dirk Lars Engelberg

doi:10.1016/j.electacta.2020.137668

Corrosion Electrochemistry with a Segmented Array Bipolar Electrode

Yiqi Zhou, Nicholas Stevens, Dirk Lars Engelberg

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Bipolar electrochemistry was applied to determine the full spectrum of anodic-to-cathodic polarisation behaviour of stainless steel. The potential and current distributions at the sample surface were determined using a segmented array bipolar electrode (BPE). The measured potential shows a quasi-linear gradient along the centre of the BPE, with the current following an exponential Butler-Volmer-type relationship. Bipolar electrochemistry is compared to conventional 3-electrode polarisation testing, allowing determination of the critical pitting potential, general corrosion rates and the cathodic current response. The application of bipolar electrochemistry is demonstrated via measurement of pit growth kinetics in ferritic stainless steel.

Original language	English
Article number	137668
Journal	Electrochimica Acta
Volume	375
Early online date	24 Dec 2020
DOIs	https://doi.org/10.1016/j.electacta.2020.137668
Publication status	Published - 10 Apr 2021

Keywords

Bipolar electrochemistry
Butler–Volmer equation
Pitting
Potentio-dynamic/Potentio-static polarisation
Stainless steel

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title = "Corrosion Electrochemistry with a Segmented Array Bipolar Electrode",

abstract = "Bipolar electrochemistry was applied to determine the full spectrum of anodic-to-cathodic polarisation behaviour of stainless steel. The potential and current distributions at the sample surface were determined using a segmented array bipolar electrode (BPE). The measured potential shows a quasi-linear gradient along the centre of the BPE, with the current following an exponential Butler-Volmer-type relationship. Bipolar electrochemistry is compared to conventional 3-electrode polarisation testing, allowing determination of the critical pitting potential, general corrosion rates and the cathodic current response. The application of bipolar electrochemistry is demonstrated via measurement of pit growth kinetics in ferritic stainless steel.",

keywords = "Bipolar electrochemistry, Butler–Volmer equation, Pitting, Potentio-dynamic/Potentio-static polarisation, Stainless steel",

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AU - Zhou, Yiqi

AU - Stevens, Nicholas

AU - Engelberg, Dirk Lars

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N2 - Bipolar electrochemistry was applied to determine the full spectrum of anodic-to-cathodic polarisation behaviour of stainless steel. The potential and current distributions at the sample surface were determined using a segmented array bipolar electrode (BPE). The measured potential shows a quasi-linear gradient along the centre of the BPE, with the current following an exponential Butler-Volmer-type relationship. Bipolar electrochemistry is compared to conventional 3-electrode polarisation testing, allowing determination of the critical pitting potential, general corrosion rates and the cathodic current response. The application of bipolar electrochemistry is demonstrated via measurement of pit growth kinetics in ferritic stainless steel.

AB - Bipolar electrochemistry was applied to determine the full spectrum of anodic-to-cathodic polarisation behaviour of stainless steel. The potential and current distributions at the sample surface were determined using a segmented array bipolar electrode (BPE). The measured potential shows a quasi-linear gradient along the centre of the BPE, with the current following an exponential Butler-Volmer-type relationship. Bipolar electrochemistry is compared to conventional 3-electrode polarisation testing, allowing determination of the critical pitting potential, general corrosion rates and the cathodic current response. The application of bipolar electrochemistry is demonstrated via measurement of pit growth kinetics in ferritic stainless steel.

KW - Bipolar electrochemistry

KW - Butler–Volmer equation

KW - Pitting

KW - Potentio-dynamic/Potentio-static polarisation

KW - Stainless steel

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DO - 10.1016/j.electacta.2020.137668

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VL - 375

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 137668

ER -

Corrosion Electrochemistry with a Segmented Array Bipolar Electrode

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