Corrosion mechanisms in aqueous solutions containing dissolved H2S. Part 2: Model of the cathodic reactions on a 316L stainless steel rotating disc electrode

In H2S containing solutions, the reduction of protons with a buffer effect contributing to the transport of protons at the steel surface, is not sufficient to explain the cathodic polarization curves obtained on 316L stainless steel. An additional electrochemical reaction was observed and was attrib...

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Bibliographic Details
Published in:	Electrochimica acta Vol. 124; pp. 46 - 51
Main Authors:	Tribollet, B., Kittel, J., Meroufel, A., Ropital, F., Grosjean, F., Sutter, E.M.M.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-04-2014 Elsevier
Subjects:	Cathodic reaction Chemical Sciences Corrosion H2S Other Weak acid H2S Model Cathodic reaction Corrosion Weak acid
Online Access:	Get full text
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Summary:	In H2S containing solutions, the reduction of protons with a buffer effect contributing to the transport of protons at the steel surface, is not sufficient to explain the cathodic polarization curves obtained on 316L stainless steel. An additional electrochemical reaction was observed and was attributed to a direct H2S reduction. A numerical model is presented with these hypotheses and a good agreement is found with the experimental data presented in a previous paper. With this model it is also possible to present the concentration profiles of the different species involved in the cathodic process.
ISSN:	0013-4686 1873-3859
DOI:	10.1016/j.electacta.2013.08.133