Mathematical Models for Under-Deposit Corrosion

Chang, Ya-Chiao; Orazem, Mark E.

doi:10.1149/ma2012-02/22/2211

Cited by 1 publication

(1 citation statement)

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“…In recent years, numerical simulation has been proposed as a method to link corrosion measurement results and corrosion process quantification, and then models for precise prediction of the atmospheric corrosion process have been established [21][22][23][24][25] . Venkatraman et al 26 published a one-dimensional mathematical model for the natural corrosion of the bare metal surface under a thin electrolyte layer based on the mixed potential theory, indicating that the corrosion current and potential are functions of the electrolyte thickness.…”

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confidence: 99%

Numerical simulation of carbon steel atmospheric corrosion under varying electrolyte-film thickness and corrosion product porosity

Liu

et al. 2023

npj Mater Degrad

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A finite element model is developed to study dynamics of atmospheric corrosion of carbon steel, focusing on the influence of thin electrolyte film thickness under varying corrosion product porosity. Calculations have been done to evaluate the impact of electrolyte film thickness and corrosion product porosity on oxygen diffusion path, and the hindrance effect of corrosion products on the metal surface activity. The time evolution of corrosion current density and controlling steps in the corrosion process are explored. When the corrosion products are loose, oxygen diffusion is the dominant controlling step, and the thicker the electrolyte film, the lower the corrosion rate. When they are dense, the corrosion process is controlled by the mixture of oxygen diffusion and the surface discharge. The oxygen diffusion path is determined only by the corrosion product porosity, and therefore the corrosion rate is not affected by the electrolyte film thickness.

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