Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings

Samuel R. Cross; Srikant Gollapudi; Christopher A. Schuh

doi:10.1016/j.corsci.2014.07.033

Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings

Samuel R. Cross, Srikant Gollapudi, Christopher A. Schuh^*

^*Corresponding author for this work

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Abstract

A time-dependent finite element model was developed to simulate the corrosion of zinc and aluminum coatings, galvanically coupled to a mild steel substrate in deaerated 0.01 M H₂SO₄ electrolyte. The simulations of galvanic corrosion for each of the coatings were compared to experimental measurements of open circuit potential, and changes in coating geometry measured via surface profilometry. Good agreement between the model predictions and corrosion tests were observed initially for both coatings. However, in the case of the zinc coating, divergence was observed between the simulation and the corrosion test after approximately 40min, due to a decrease in the reactivity of the zinc surface.

Original language	English (US)
Pages (from-to)	226-233
Number of pages	8
Journal	Corrosion Science
Volume	88
DOIs	https://doi.org/10.1016/j.corsci.2014.07.033
State	Published - Nov 2014

Keywords

A. Aluminum
A. zinc
B. Modelling studies
C. Cathodic protection

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2014.07.033

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title = "Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings",

abstract = "A time-dependent finite element model was developed to simulate the corrosion of zinc and aluminum coatings, galvanically coupled to a mild steel substrate in deaerated 0.01 M H2SO4 electrolyte. The simulations of galvanic corrosion for each of the coatings were compared to experimental measurements of open circuit potential, and changes in coating geometry measured via surface profilometry. Good agreement between the model predictions and corrosion tests were observed initially for both coatings. However, in the case of the zinc coating, divergence was observed between the simulation and the corrosion test after approximately 40min, due to a decrease in the reactivity of the zinc surface.",

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T1 - Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings

AU - Cross, Samuel R.

AU - Gollapudi, Srikant

AU - Schuh, Christopher A.

PY - 2014/11

Y1 - 2014/11

N2 - A time-dependent finite element model was developed to simulate the corrosion of zinc and aluminum coatings, galvanically coupled to a mild steel substrate in deaerated 0.01 M H2SO4 electrolyte. The simulations of galvanic corrosion for each of the coatings were compared to experimental measurements of open circuit potential, and changes in coating geometry measured via surface profilometry. Good agreement between the model predictions and corrosion tests were observed initially for both coatings. However, in the case of the zinc coating, divergence was observed between the simulation and the corrosion test after approximately 40min, due to a decrease in the reactivity of the zinc surface.

AB - A time-dependent finite element model was developed to simulate the corrosion of zinc and aluminum coatings, galvanically coupled to a mild steel substrate in deaerated 0.01 M H2SO4 electrolyte. The simulations of galvanic corrosion for each of the coatings were compared to experimental measurements of open circuit potential, and changes in coating geometry measured via surface profilometry. Good agreement between the model predictions and corrosion tests were observed initially for both coatings. However, in the case of the zinc coating, divergence was observed between the simulation and the corrosion test after approximately 40min, due to a decrease in the reactivity of the zinc surface.

KW - A. Aluminum

KW - A. zinc

KW - B. Modelling studies

KW - C. Cathodic protection

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SP - 226

EP - 233

JO - Corrosion Science

JF - Corrosion Science

ER -

Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings

Abstract

Keywords

ASJC Scopus subject areas

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