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 |
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Pages (from-to) | 673-679 |
Number of pages | 7 |
Journal | Protection of Metals and Physical Chemistry of Surfaces |
Volume | 54 |
Issue number | 4 |
DOIs | |
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