Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media

Abstract Corrosion in carbonated concrete is an example of corrosion in dense porous media of tremendous socio-economic and scientific relevance. The widespread research endeavors to develop novel, environmentally friendly cements raise questions regarding their ability to protect the embedded steel...

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Autores principales:	Matteo Stefanoni, Ueli M. Angst, Bernhard Elsener
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a294795edce7437887bbc2c92fc61094
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spelling	oai:doaj.org-article:a294795edce7437887bbc2c92fc610942021-12-02T12:32:09ZElectrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media10.1038/s41598-018-25794-x2045-2322https://doaj.org/article/a294795edce7437887bbc2c92fc610942018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25794-xhttps://doaj.org/toc/2045-2322Abstract Corrosion in carbonated concrete is an example of corrosion in dense porous media of tremendous socio-economic and scientific relevance. The widespread research endeavors to develop novel, environmentally friendly cements raise questions regarding their ability to protect the embedded steel from corrosion. Here, we propose a fundamentally new approach to explain the scientific mechanism of corrosion kinetics in dense porous media. The main strength of our model lies in its simplicity and in combining the capillary condensation theory with electrochemistry. This reveals that capillary condensation in the pore structure defines the electrochemically active steel surface, whose variability upon changes in exposure relative humidity is accountable for the wide variability in measured corrosion rates. We performed experiments that quantify this effect and find good agreement with the theory. Our findings are essential to devise predictive models for the corrosion performance, needed to guarantee the safety and sustainability of traditional and future cements.Matteo StefanoniUeli M. AngstBernhard ElsenerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Matteo Stefanoni Ueli M. Angst Bernhard Elsener Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
description	Abstract Corrosion in carbonated concrete is an example of corrosion in dense porous media of tremendous socio-economic and scientific relevance. The widespread research endeavors to develop novel, environmentally friendly cements raise questions regarding their ability to protect the embedded steel from corrosion. Here, we propose a fundamentally new approach to explain the scientific mechanism of corrosion kinetics in dense porous media. The main strength of our model lies in its simplicity and in combining the capillary condensation theory with electrochemistry. This reveals that capillary condensation in the pore structure defines the electrochemically active steel surface, whose variability upon changes in exposure relative humidity is accountable for the wide variability in measured corrosion rates. We performed experiments that quantify this effect and find good agreement with the theory. Our findings are essential to devise predictive models for the corrosion performance, needed to guarantee the safety and sustainability of traditional and future cements.
format	article
author	Matteo Stefanoni Ueli M. Angst Bernhard Elsener
author_facet	Matteo Stefanoni Ueli M. Angst Bernhard Elsener
author_sort	Matteo Stefanoni
title	Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
title_short	Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
title_full	Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
title_fullStr	Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
title_full_unstemmed	Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
title_sort	electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a294795edce7437887bbc2c92fc61094
work_keys_str_mv	AT matteostefanoni electrochemistryandcapillarycondensationtheoryrevealthemechanismofcorrosionindenseporousmedia AT uelimangst electrochemistryandcapillarycondensationtheoryrevealthemechanismofcorrosionindenseporousmedia AT bernhardelsener electrochemistryandcapillarycondensationtheoryrevealthemechanismofcorrosionindenseporousmedia
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Electrochemistry and capillary condensation theory reveal the mechanism of corrosion in dense porous media

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