Numerical Modeling of Galvanic Corrosion Behaviors on Uranium Surface

Ping An Shi; Hong Liang Zhou

doi:10.4028/www.scientific.net/AMR.702.140

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 702Numerical Modeling of Galvanic Corrosion Behaviors...

Numerical Modeling of Galvanic Corrosion Behaviors on Uranium Surface

Abstract:

The Uranium and Titanium corrosion rates are described by a Tafel’s relationship, and the cathodic protection of Uranium is a function of a Wagner number. A numerical simulation of galvanic corrosion of Uranium surface under thin layer electrolyte is presented. The model considered that the effect of a circular defect and oxygen reduction and corrosion in the Uranium surface, the effect of electrolyte thickness and conductivity and defect radius on corrosion current distribution of Uranium with is investigated. The results shows that the corrosion rate at the center is non-uniform, and it could lead to the formation of a hemispherical-shaped pit. And the effect of radius is to increase the importance of the electrode kinetics relative to ohmic resistance, and to increase the potential difference between the center and edge of the Uranium surface, resulting in non-uniform corrosion current distribution.

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Periodical:

Advanced Materials Research (Volume 702)

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140-144

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.702.140

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Online since:

May 2013

Authors:

Ping An Shi, Hong Liang Zhou

Keywords:

Galvanic Corrosion, Interface, Numerical Simulation, Tafel’s Relationship

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