Premium
Corrosion protection of steel cut‐edges by hot‐dip galvanized Al(Zn,Mg) coatings in 1 wt% NaCl: Part II. Numerical simulations
Author(s) -
Dolgikh Olga,
Simillion Hans,
Lamaka Sviatlana V.,
Bastos Alexandre C.,
Xue Huibin B.,
Taryba Maryna G.,
Oliveira Andre R.,
Allély Christian,
Van Den Bossche Bart,
Van Den Bergh Krista,
De Strycker Joost,
Deconinck Johan
Publication year - 2019
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201810210
Subject(s) - galvanization , corrosion , materials science , electrolyte , coating , metallurgy , aluminium , zinc , composite material , chemistry , electrode , layer (electronics)
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.