Electrochemical tomography as a nondestructive technique to study localized corrosion of metals

Abstract We present an approach, termed electrochemical tomography (ECT), for the in-situ study of corrosion phenomena in general, and for the quantification of the instantaneous rate of localized corrosion in particular. Traditional electrochemical techniques have limited accuracy in determining th...

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Autores principales:	M. C. van Ede, C. J. Earls, A. Fichtner, U. Angst
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/f7a29547a5a8408a99153ff49910ee4c
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spelling	oai:doaj.org-article:f7a29547a5a8408a99153ff49910ee4c2021-12-05T12:05:37ZElectrochemical tomography as a nondestructive technique to study localized corrosion of metals10.1038/s41529-021-00209-x2397-2106https://doaj.org/article/f7a29547a5a8408a99153ff49910ee4c2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00209-xhttps://doaj.org/toc/2397-2106Abstract We present an approach, termed electrochemical tomography (ECT), for the in-situ study of corrosion phenomena in general, and for the quantification of the instantaneous rate of localized corrosion in particular. Traditional electrochemical techniques have limited accuracy in determining the corrosion rate when applied to localized corrosion, especially for metals embedded in opaque, porous media. One major limitation is the generally unknown anodic surface area. ECT overcomes these limitations by combining a numerical forward model, describing the electrical potential field in the porous medium, with electrochemical measurements taken at the surface, and using a stochastic inverse method to determine the corrosion rate, and the location and size of the anodic site. Additionally, ECT yields insight into parameters such as the exchange current densities, and it enables the quantification of the uncertainty of the obtained solution. We illustrate the application of ECT for the example of localized corrosion of steel in concrete.M. C. van EdeC. J. EarlsA. FichtnerU. AngstNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 M. C. van Ede C. J. Earls A. Fichtner U. Angst Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
description	Abstract We present an approach, termed electrochemical tomography (ECT), for the in-situ study of corrosion phenomena in general, and for the quantification of the instantaneous rate of localized corrosion in particular. Traditional electrochemical techniques have limited accuracy in determining the corrosion rate when applied to localized corrosion, especially for metals embedded in opaque, porous media. One major limitation is the generally unknown anodic surface area. ECT overcomes these limitations by combining a numerical forward model, describing the electrical potential field in the porous medium, with electrochemical measurements taken at the surface, and using a stochastic inverse method to determine the corrosion rate, and the location and size of the anodic site. Additionally, ECT yields insight into parameters such as the exchange current densities, and it enables the quantification of the uncertainty of the obtained solution. We illustrate the application of ECT for the example of localized corrosion of steel in concrete.
format	article
author	M. C. van Ede C. J. Earls A. Fichtner U. Angst
author_facet	M. C. van Ede C. J. Earls A. Fichtner U. Angst
author_sort	M. C. van Ede
title	Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
title_short	Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
title_full	Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
title_fullStr	Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
title_full_unstemmed	Electrochemical tomography as a nondestructive technique to study localized corrosion of metals
title_sort	electrochemical tomography as a nondestructive technique to study localized corrosion of metals
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f7a29547a5a8408a99153ff49910ee4c
work_keys_str_mv	AT mcvanede electrochemicaltomographyasanondestructivetechniquetostudylocalizedcorrosionofmetals AT cjearls electrochemicaltomographyasanondestructivetechniquetostudylocalizedcorrosionofmetals AT afichtner electrochemicaltomographyasanondestructivetechniquetostudylocalizedcorrosionofmetals AT uangst electrochemicaltomographyasanondestructivetechniquetostudylocalizedcorrosionofmetals
_version_	1718372291949101056

Electrochemical tomography as a nondestructive technique to study localized corrosion of metals

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