Brass dezincification with a bipolar electrochemistry technique

Yiqi Zhou; Sultan Mahmood; Dirk Engelberg

doi:10.1016/j.surfin.2020.100865

Brass dezincification with a bipolar electrochemistry technique

Yiqi Zhou, Sultan Mahmood, Dirk Engelberg

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

Abstract

A bipolar electrochemistry approach was applied to characterise the dezincification of brass. The dissolution of both Cu and Zn resulted in the formation of Cu2O, CuO, ZnO and CuClx, with corrosion product formation characterised as a function of the potential gradient. At low potentials, protective corrosion products formed, with compositional changes observed via dezincification up to a critical applied potential threshold. Above the critical potential, no corrosion products could form, resulting in higher corrosion rates. The influence of corrosion product formation after bipolar electrochemistry assessment is compared to results from standard three-electrode potentiodynamic polarisation tests.

Original language	English
Article number	100865
Journal	Surfaces and Interfaces
Volume	22
Early online date	3 Dec 2020
DOIs	https://doi.org/10.1016/j.surfin.2020.100865
Publication status	Published - 1 Feb 2021

Keywords

Bipolar electrochemistry
SEM/Raman/GI-XRD
dezincification
potentiodynamic polarisation

Research Beacons, Institutes and Platforms

Dalton Nuclear Institute

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10.1016/j.surfin.2020.100865Licence: CC BY

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title = "Brass dezincification with a bipolar electrochemistry technique",

abstract = "A bipolar electrochemistry approach was applied to characterise the dezincification of brass. The dissolution of both Cu and Zn resulted in the formation of Cu2O, CuO, ZnO and CuClx, with corrosion product formation characterised as a function of the potential gradient. At low potentials, protective corrosion products formed, with compositional changes observed via dezincification up to a critical applied potential threshold. Above the critical potential, no corrosion products could form, resulting in higher corrosion rates. The influence of corrosion product formation after bipolar electrochemistry assessment is compared to results from standard three-electrode potentiodynamic polarisation tests.",

keywords = "Bipolar electrochemistry, SEM/Raman/GI-XRD, dezincification, potentiodynamic polarisation",

author = "Yiqi Zhou and Sultan Mahmood and Dirk Engelberg",

note = "Funding Information: The authors acknowledge the support of the Henry Royce Institute for access to the ZEISS Sigma FEG-SEM, Keyence laser scanning confocal microscope, and Raman spectroscopy at Royce@Manchester (EP/R00661X/1). SM also acknowledges NGN EPSRC grant number (EP/L015390/1) and Sellafield Ltd. for top-up funding. Publisher Copyright: {\textcopyright} 2020 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.surfin.2020.100865",

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T1 - Brass dezincification with a bipolar electrochemistry technique

AU - Zhou, Yiqi

AU - Mahmood, Sultan

AU - Engelberg, Dirk

N1 - Funding Information: The authors acknowledge the support of the Henry Royce Institute for access to the ZEISS Sigma FEG-SEM, Keyence laser scanning confocal microscope, and Raman spectroscopy at Royce@Manchester (EP/R00661X/1). SM also acknowledges NGN EPSRC grant number (EP/L015390/1) and Sellafield Ltd. for top-up funding. Publisher Copyright: © 2020 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/2/1

Y1 - 2021/2/1

N2 - A bipolar electrochemistry approach was applied to characterise the dezincification of brass. The dissolution of both Cu and Zn resulted in the formation of Cu2O, CuO, ZnO and CuClx, with corrosion product formation characterised as a function of the potential gradient. At low potentials, protective corrosion products formed, with compositional changes observed via dezincification up to a critical applied potential threshold. Above the critical potential, no corrosion products could form, resulting in higher corrosion rates. The influence of corrosion product formation after bipolar electrochemistry assessment is compared to results from standard three-electrode potentiodynamic polarisation tests.

AB - A bipolar electrochemistry approach was applied to characterise the dezincification of brass. The dissolution of both Cu and Zn resulted in the formation of Cu2O, CuO, ZnO and CuClx, with corrosion product formation characterised as a function of the potential gradient. At low potentials, protective corrosion products formed, with compositional changes observed via dezincification up to a critical applied potential threshold. Above the critical potential, no corrosion products could form, resulting in higher corrosion rates. The influence of corrosion product formation after bipolar electrochemistry assessment is compared to results from standard three-electrode potentiodynamic polarisation tests.

KW - Bipolar electrochemistry

KW - SEM/Raman/GI-XRD

KW - dezincification

KW - potentiodynamic polarisation

U2 - 10.1016/j.surfin.2020.100865

DO - 10.1016/j.surfin.2020.100865

M3 - Article

SN - 2468-0230

VL - 22

JO - Surfaces and Interfaces

JF - Surfaces and Interfaces

M1 - 100865

ER -

Brass dezincification with a bipolar electrochemistry technique

Abstract

Keywords

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