A transient multi-ion transport model for galvanized steel corrosion protection

Ţopa, Vasile; Demeter, A.S.; Hotoiu, L.; Deconinck, Daan; Deconinck, Johan

doi:10.1016/j.electacta.2012.06.021

Cited by 30 publications

(19 citation statements)

References 39 publications

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“…In spite of the large impact of the electrolyte thickness and composition, most models focus on the pure electrochemical aspect of the problem, largely ignoring the dynamic film formation. [2][3][4][5] A general review of the advances in atmospheric corrosion modeling can be found in Ref. 6.…”

mentioning

confidence: 99%

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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mentioning

confidence: 99%

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Steen

Simillion

Thierry

et al. 2017

J. Electrochem. Soc.

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“…A sophisticated mathematical model and a broad variety of input parameters are required in order to ensure usable and realistic behavior of the model. In order to solve this extremely non‐linear problem, the following assumptions were made to simplify the simulation: (1) Well mixed, incompressible, and electroneutral electrolyte solution. (2) No interfacial resistance due to corrosion product is not considered here.…”

Section: Finite Element Simulationmentioning

confidence: 99%

“…The material transfer in electrolyte solution can be described by the Nernst–Planck equation, where the flux density of each dissolved species is:

N_{normali} = - z_{normali} u_{normali} F c_{normali} \nabla φ - D_{normali} \nabla c_{normali} + c_{normali} v,

where z i , c i , D i , and u i are the charge number, concentration, diffusion coefficient, and mobility of species i, respectively. F is the Faraday constant.…”

Section: Finite Element Simulationmentioning

confidence: 99%

“…The atmospheric corrosion coupled with the fatigue effect caused by the vibration leads to the fracture of aircraft structure. Great efforts are being made to model atmospheric corrosion mathematically, because these models can be helpful in various fields of technology . In contrast with other paper, this work proposes a simulation prediction system, test pieces → flat test pieces → structural parts, for the atmospheric corrosion of aircraft which provides new ideas for the application of corrosion simulation on aircraft corrosion prediction.…”

Section: Introductionmentioning

confidence: 99%

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A method of atmospheric corrosion prediction for aircraft structure

Chen

Huang

Zhang

et al. 2018

Materials & Corrosion

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A simulation prediction system, test pieces → flat test pieces → structural parts, for the atmospheric corrosion of aircraft is proposed to provide guidance for aircraft anti‐corrosion material selection and outfield maintenance. Based on the shell current distribution, a COMSOL corrosion simulation prediction model was constructed and applied to three types of test parts. The correctness of simulation principle is verified by comparing the galvanic current of simulation and test on each electrode surface of multi‐electrode system. Comparing the simulated potential distribution at 100 µm electrolyte layer with the corrosion morphology after 12 wet–dry corrosion periods, it is found that simulation and test are in good agreement. It is also proved that the 100 µm static liquid film can reflect the corrosion of this kind of wet–dry cycle. Comparing the corrosion depths of different periods at three different points and the simulated corrosion depth with time, it is found that the corrosion depth of the first four periods was larger than the simulated depth, which was less than the simulated value after four periods. The model was applied to the local structural parts of aircraft. Then, corrosion position and corrosion area were predicted. The results were compared with the accelerated test results to verify the accuracy of the model's prediction of structural parts. At the same time, the corrosion depth of the structural parts was also predicted.

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“…Such models have been applied by Thébault et al for the study of corrosion of galvanized steel under thin film electrolytes. Topa et al performed a similar study, but for thicker electrolyte layers. They introduced an artificial flow to mimic the natural convection in the electrolyte, which avoids flow calculations and simplifies the calculations.…”

Section: Introductionmentioning

confidence: 96%

Corrosion protection of steel cut‐edges by hot‐dip galvanized Al(Zn,Mg) coatings in 1 wt% NaCl: Part II. Numerical simulations

Долгих

Simillion

Lamaka

et al. 2019

Materials & Corrosion

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In this paper a mechanistic model is elaborated to simulate the corrosion behavior of aluminum–zinc–magnesium coatings on steel. The model is based on the mass transport and reactions of the ions in the electrolyte (MITReM). The finite element method has been used, which allows to perform time‐dependent simulations with micrometer scale to study local corrosion effects. The formation of corrosion products and the prediction of electrolyte concentration distributions are compared for different metallic coating compositions. The spatial and temporal simulation of complex precipitates provides an additional tool to validate the model through corrosion product characterization. The simulation results are compared to experimental observations, presented in part I of this paper. The MITReM simulations are limited to the micro‐scale and therefore to small geometries. A link is made with the potential model which can be applied on macro‐scale objects. A qualitative agreement is found between the simulations at both scales and the experiments. Further quantification of this model would optimize the simulations for material design and for predictive maintenance.

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A transient multi-ion transport model for galvanized steel corrosion protection

Cited by 30 publications

References 39 publications

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

Comparing Modeled and Experimental Accelerated Corrosion Tests on Steel

A method of atmospheric corrosion prediction for aircraft structure

Corrosion protection of steel cut‐edges by hot‐dip galvanized Al(Zn,Mg) coatings in 1 wt% NaCl: Part II. Numerical simulations

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