An integrated modeling approach for atmospheric corrosion in presence of a varying electrolyte film

Steen, Nils Van den; Simillion, Hans; Долгих, О. В.; Terryn, Herman; Deconinck, Johan

doi:10.1016/j.electacta.2015.11.010

Cited by 55 publications

(47 citation statements)

References 30 publications

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“…A thorough overview of the governing equations can be found in Ref. 7. When a salt spray/fog is modeled, the following assumption is made.…”

Section: Physics and Modelmentioning

confidence: 99%

“…31,33 A more extensive overview of equations and applied limits as given previously. 7 This model is applicable only when dealing with a clean steel substrate, excluding all discussions on the role of oxide layers, passivation, corrosion products, etc. All elements could be added, but would deviate from the focus on the role of varying environment in presence of salts.…”

Section: Physics and Modelmentioning

confidence: 99%

“…A more in-depth overview is given on the sections of the model which have been improved compared to previous work. 7 The goal of this work, the comparison between the simulated and experimental results, is done in the next section. Finally, conclusions are formulated with suggestions for future work.…”

mentioning

confidence: 99%

“…The first results of the Dynamic Electrolyte Film Corrosion (DEFC) model were presented in a previous paper, 7 focussing on the physics and applicability of the proposed model. While this paper, based on the work of Baklouti et al, 8 still concentrates on the liquid film formation, simulated general corrosion depths are compared with experimental data for different accelerated corrosion tests obtained with the electrical resistance (ER) sensors.…”

mentioning

confidence: 99%

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Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Steen

Simillion

Thierry

et al. 2017

J. Electrochem. Soc.

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Four different accelerated corrosion tests on steel are simulated with a Dynamic Electrolyte Film Corrosion model. Based on the time dependent temperature and humidity, combined with the presence of hygroscopic salts, a time dependent electrolyte thickness is calculated. At every timestep, the modeled film thickness dictates the corrosion current. Focussing on the thickness predictions, an elementary corrosion model is adopted to enable the corrosion depth estimations. The trends of the simulated corrosion depths are compared with experimental data obtained with an electrical resistance corrosion sensing system, demonstrating the importance of the electrolyte thickness and composition for a thorough understanding and modeling of atmospheric corrosion on steel.

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“…A thorough overview of the governing equations can be found in Ref. 7. When a salt spray/fog is modeled, the following assumption is made.…”

Section: Physics and Modelmentioning

confidence: 99%

Section: Physics and Modelmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Steen

Simillion

Thierry

et al. 2017

J. Electrochem. Soc.

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“…The limiting mass transfer current density

j_{\lim, O_{2}}

is related to the rate of transport by oxygen diffusion from the bulk solution through the boundary layer to the steel surface [33]:

j_{\lim, {normalO}_{2}} = \frac{4 F D_{{normalO}_{2}} C_{{normalO}_{2}}^{b}}{δ}

…”

Section: Modeling Descriptionmentioning

confidence: 99%

Corrosion Behaviors of Q345R Steel at the Initial Stage in an Oxygen-Containing Aqueous Environment: Experiment and Modeling

Chen

Zhong

et al. 2018

Materials

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The ingress of oxygen into pressure vessels used in oil & gas production and transportation could easily result in serious corrosion. In this work, the corrosion behaviors of Q345R steel at the initial stage in 1 wt.% NaCl solution were investigated using electrochemical techniques. The effects of oxygen concentration, temperature and pH on corrosion behaviors were discussed. Simultaneously, a numerical model based on the mixed potential theory was proposed. The results show that the proposed model accords well with the experimental data in the pH range from 9.0 to 5.0. In this pH range, the oxygen reduction reaction, H+ reduction, water reduction, and iron oxidation can be quantitatively analyzed using this model. However, this model shows a disagreement with the experimental data at lower pH. This can be attributed to the fact that actual area of reaction on the electrode is much smaller than the preset area due to the block effect resulted from hydrogen bubbles adsorbed on the electrode surface.

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Predictive modeling of long‐time crevice evolution at e‐coat defects under climate chamber test conditions

Bösch

Höche

Mittelbach

et al. 2017

Materials & Corrosion

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The undermining of organic coatings on galvanized steel sheets is being characterized using transient finite element simulations. Galvanized steel sheets are the most widespread parts in the automobile industry. Thus, the delamination beginning from coating defects is a crucial issue to deal with. This matter is depicted through a manually brought in impairment in the coating layers down to the steel surface. Therefore, a galvanic couple is formed and mainly the less noble zinc layer corrodes and consequently anodically undermines the organic coating. In order to predict the corrosion behavior via computational simulations, an approach is developed which uses a mixture of digitalized polarization curves as well as empirical Tafel values and reveals a significant reduction in computation time. The corrosion progress is evaluated via current distributions and the resulting damage for different electrolytes, types of galvanizing and impairment dimensions. These simulations describe the progression of the corrosive anodic delamination process over several weeks and attune well to corresponding experimental climate chamber tests and offer an acceptable validity toward corrosion related surface finishing layout.

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An integrated modeling approach for atmospheric corrosion in presence of a varying electrolyte film

Cited by 55 publications

References 30 publications

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Corrosion Behaviors of Q345R Steel at the Initial Stage in an Oxygen-Containing Aqueous Environment: Experiment and Modeling

Predictive modeling of long‐time crevice evolution at e‐coat defects under climate chamber test conditions

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