The significance of ferrous ion oxidation during corrosion of carbon steel in aerated near-neutral aqueous solutions

Ke Wang; Hanan Farhat; Mariano Iannuzzi; Katerina Lepkova

doi:10.1016/j.elecom.2023.107637

The significance of ferrous ion oxidation during corrosion of carbon steel in aerated near-neutral aqueous solutions

Ke Wang
, Hanan Farhat
, Mariano Iannuzzi
, Katerina Lepkova

Curtin University
Alcoa Corporation

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

Abstract

Numerical models were developed to investigate the significance of ferrous ion oxidation in carbon steel corrosion in near-neutral aerated aqueous solutions. The results demonstrated that the inclusion of ferrous ion oxidation improved the accuracy of pH predictions in deep crevices under cathodic protection and Evan's drop exposure conditions, closely matching experimental observations. The reaction rate for ferrous ion oxidation was found to be between 1 x 10(14) and 2 x 10(14) (mol/L)(-2) atm(-1) min(-1). These findings highlight the importance of considering ferrous ion oxidation when modelling carbon steel corrosion in near-neutral aerated aqueous solutions.

Original language	English
Article number	107637
Number of pages	6
Journal	Electrochemistry Communications
Volume	158
Early online date	Dec 2023
DOIs	https://doi.org/10.1016/j.elecom.2023.107637
Publication status	Published - Jan 2024

Keywords

Carbon steel
Crevice
Ferrous ion oxidation
Modelling
pH

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10.1016/j.elecom.2023.107637

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abstract = "Numerical models were developed to investigate the significance of ferrous ion oxidation in carbon steel corrosion in near-neutral aerated aqueous solutions. The results demonstrated that the inclusion of ferrous ion oxidation improved the accuracy of pH predictions in deep crevices under cathodic protection and Evan's drop exposure conditions, closely matching experimental observations. The reaction rate for ferrous ion oxidation was found to be between 1 x 10(14) and 2 x 10(14) (mol/L)(-2) atm(-1) min(-1). These findings highlight the importance of considering ferrous ion oxidation when modelling carbon steel corrosion in near-neutral aerated aqueous solutions.",

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AU - Farhat, Hanan

AU - Iannuzzi, Mariano

AU - Lepkova, Katerina

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AB - Numerical models were developed to investigate the significance of ferrous ion oxidation in carbon steel corrosion in near-neutral aerated aqueous solutions. The results demonstrated that the inclusion of ferrous ion oxidation improved the accuracy of pH predictions in deep crevices under cathodic protection and Evan's drop exposure conditions, closely matching experimental observations. The reaction rate for ferrous ion oxidation was found to be between 1 x 10(14) and 2 x 10(14) (mol/L)(-2) atm(-1) min(-1). These findings highlight the importance of considering ferrous ion oxidation when modelling carbon steel corrosion in near-neutral aerated aqueous solutions.

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KW - Crevice

KW - Ferrous ion oxidation

KW - Modelling

KW - pH

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The significance of ferrous ion oxidation during corrosion of carbon steel in aerated near-neutral aqueous solutions

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