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

authors	Dolgikh, O; Simillion, H; Lamaka, SV; Bastos, AC; Xue, HBB; Taryba, MG; Oliveira, AR; Allely, C; Van den Bossche, B; Van den Bergh, K; De Strycker, J; Deconinck, J
nationality	International
journal	MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
author keywords	Al(Zn Mg) alloys; cut-edge corrosion; multi-ion modeling
keywords	ATMOSPHERIC CORROSION; MODEL; ELECTRODE; LAYER; IRON
abstract	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.
publisher	WILEY-V C H VERLAG GMBH
issn	0947-5117
year published	2019
volume	70
issue	5
beginning page	780
ending page	792
digital object identifier (doi)	10.1002/maco.201810210
web of science category	Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category	Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier	WOS:000471998800002