Calculation of Uniform Corrosion Current Density of Iron in Hydrochloric Acid Solutions based on the Principle of Maximum Entropy Production Rate Applied to Literature Data

Abstract

In this paper a new procedure for the calculation of uniform corrosion current density is presented. The procedure is based on the following criterion: corrosion current and extent of anodic and cathodic areas are such that the entropy production rate is maximum. Experimental data for the reaction Fe(s) + HCl(aq) = FeCl₂(aq) + H₂(g), taken from literature, are used to test the new model. A comparison between corrosion current density calculated from weight loss measurements and current density calculated from polarization curves by means of the proposed model is carried out. The proposed model provides a better agreement, between Tafel line extrapolation and gravimetric measurement, in comparison to the mixed potential theory usually adopted.

Original language	English
Pages (from-to)	673-679
Number of pages	7
Journal	Protection of Metals and Physical Chemistry of Surfaces
Volume	54
Issue number	4
DOIs	https://doi.org/10.1134/S2070205118040160
Publication status	Published - 1 Jul 2018

Keywords

corrosion current density
entropy production rate
exchange current density
Tafel slope
uniform corrosion

ASJC Scopus subject areas

Surfaces, Coatings and Films
Organic Chemistry
Metals and Alloys
Materials Chemistry

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10.1134/S2070205118040160

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Calculation of Uniform Corrosion Current Density of Iron in Hydrochloric Acid Solutions based on the Principle of Maximum Entropy Production Rate Applied to Literature Data. / Bestetti, Massimiliano; Franz, Silvia; Hashempour, Mazdak I.; Vicenzo, Antonello.

In: Protection of Metals and Physical Chemistry of Surfaces, Vol. 54, No. 4, 01.07.2018, p. 673-679.

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

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abstract = "In this paper a new procedure for the calculation of uniform corrosion current density is presented. The procedure is based on the following criterion: corrosion current and extent of anodic and cathodic areas are such that the entropy production rate is maximum. Experimental data for the reaction Fe(s) + HCl(aq) = FeCl2(aq) + H2(g), taken from literature, are used to test the new model. A comparison between corrosion current density calculated from weight loss measurements and current density calculated from polarization curves by means of the proposed model is carried out. The proposed model provides a better agreement, between Tafel line extrapolation and gravimetric measurement, in comparison to the mixed potential theory usually adopted.",

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AU - Vicenzo, Antonello

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