Numerical Analysis Model of Galvanic Corrosion with Ion Movement and Reactions

Okada, Nobuhiro; Matsumoto, Masamitsu; Nishihara, Katsuhiro; Kimoto, Masanari; Kudo, Takeo; Fujimoto, Shinji

doi:10.2355/isijinternational.50.743

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Transport of species i can be represented by Nernst‐Planck equation as:

N_{i} = - D_{i} \nabla c_{i} - z_{i} F u_{i} c_{i} \nabla E + c_{i} U

where E is potential in the electrolyte, N i is the flux, D i is the diffusion coefficient, c i is the concentration, z i is the charge, and u i is the mobility of species i , respectively, F is the Faraday constant, E is the electric potential, and U is the solvent velocity.…”

Section: Numerical Model and Boundary Conditionmentioning

confidence: 99%

“…There are two main types of protection methods for galvanic corrosion, one is to insulate or block the direct electrical contact between environmental medium and materials by covering coating or insulating washer to reduce corrosion rate; another is to decrease or even to avoid the risk of galvanic corrosion as far as possible by reasonable structure design . The research methods of galvanic corrosion cover experimental and numerical modeling . Experimental methods mainly include weight loss, polarization curve measurement used to predict galvanic current density by the polarization curve superposition, galvanic current measurement by zero resistance galvanometer, and the scanning electrode vibration test (SVET) .…”

Section: Introductionmentioning

confidence: 99%

“…This new method was applied on the numerical simulation, and then, the results of numerical simulation were verified by the experiment results, indicating a reference to modeling multi-metals complicated galvanic couple. [22,34,43,44] as:…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A method for determining the polarization state of the metal with the middle potential in order to calculate the corrosion rate of multi‐metals complicated galvanic couple

Zhang

Geng

et al. 2017

Materials & Corrosion

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A method based on the mixed potential theory is put forward to determine the polarization state of the metal with the middle potential in tri‐metals galvanic couple. The potential distribution and current density distribution of the complicated galvanic couple composed of AA5083, 20# steel, and H62 copper alloy were simulated by finite element method, and the effect of configuration position on the complicated galvanic corrosion behavior was studied, which was verified by the galvanic current measurement. The results of experiment and numerical simulation match well, indicating that the method to determine the polarization state of the metal with the middle potential is reliable, which provides the reference to modeling multi‐metals complicated galvanic corrosion.

show abstract

“…Transport of species i can be represented by Nernst‐Planck equation as:

N_{i} = - D_{i} \nabla c_{i} - z_{i} F u_{i} c_{i} \nabla E + c_{i} U

Section: Numerical Model and Boundary Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A method for determining the polarization state of the metal with the middle potential in order to calculate the corrosion rate of multi‐metals complicated galvanic couple

Zhang

Geng

et al. 2017

Materials & Corrosion

View full text Add to dashboard Cite

show abstract

“…These works cover many scenarios and important factors that influence distributions of the time, t = 0. Also, Okado [15] presents a well-structured complete initiation model, including species. This paper could be useful in extending the current model to one that incorporates spatially varying chemical species profiles.…”

Section: Literature Reviewmentioning

confidence: 99%

One-dimensional approach to modeling damage evolution in galvanic corrosion

et al. 2014

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“…Therefore, to clarify the mechanisms for suppressing the chathodic reaction, the film formation was investigated by the numerical analysis for galvanic corrosion considering ions transportation and precipitation reactions. 8) Here, the anodic reactions of both Al and Zn for AZ electrode are to be considered, but the modeling of Al anode is not accomplished. In the initial stage, the anodic reaction of Zn is a major reaction, so Zn/Fe model was investigated.…”

Section: Numerical Analysismentioning

confidence: 99%