3D computer simulation of the influence of microstructure on the cut edge corrosion behaviour of a zinc aluminium alloy galvanized steel

Brown, S. G. R.; Barnard, Nicholas

doi:10.1016/j.corsci.2005.08.015

Cited by 24 publications

(11 citation statements)

References 11 publications

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“…The modellers who followed the deterministic path (e.g., Refs. [65][66][67] have defined the microstructure either in their computational grids 65,66 or treated them as a regular array and used analytical solution methods. 67 The modellers who work in the stochastic realm have used probability density functions (PDFs) (e.g., Ref.…”

Section: Continuum Models: Rudimentary Description Of Microstructuresmentioning

confidence: 99%

Towards multiscale modelling of localised corrosion

Gunasegaram

Venkatraman

Cole

2013

International Materials Reviews

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Localised corrosion is a cause of unanticipated and sometimes catastrophic failures of equipment, transport vessels and infrastructures. Therefore, the development of modern corrosion-resistant materials and inhibitors by design is both technically and economically attractive. In the coming decades, industrial components will be engineered from molecular structures. This prospect provides the designer with a truly enormous range of choices in design, which is a situation that demands predictive tools that can link molecular structures with the final component performance. In particular, the development of alloys and inhibitors can replace the use of toxic compounds in protecting metal surfaces. To execute a tailored design programme, it is necessary to understand how corrosion and the associated processes occur from the molecular level to the component level and how the overall system behaviour emerges because of the inherent links among different scales. Therefore, in the present work, the literature on theoretical modelling of localised corrosion and related experimentation are reviewed from a multiscale viewpoint. The review addresses (a) the challenges in the theoretical formulation of the important phenomena that influence localised corrosion and (b) the hurdles facing computational methods. It is shown that (i) the existing models lack the resolution to design effective corrosionresistant systems, (ii) the numerical strategies for linking the scales are in a state of evolution and (iii) there are gaps in the experimental characterisation of the corrosion system, particularly at the lower end of the scales. Suggestions are provided towards the construction of a multiscale model (MSM) for localised corrosion.

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Section: Continuum Models: Rudimentary Description Of Microstructuresmentioning

confidence: 99%

Towards multiscale modelling of localised corrosion

Gunasegaram

Venkatraman

Cole

2013

International Materials Reviews

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“…To our knowledge, only one attempt has been made to numerically model the corrosion behavior of the cut edge [6]. This model emphasized the localized corrosion of the zinc-based coating, and did not allow a direct comparison with SVET results.…”

Section: Introductionmentioning

confidence: 97%

Investigation of self-healing mechanism on galvanized steels cut edges by coupling SVET and numerical modeling

Thébault

Vuillemin

Oltra

et al. 2008

Electrochimica Acta

129

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“…The algorithm presented is an extension of a first order model developed previously, whereby the evolving ionic concentration was approximated by the changes in effective free proton concentration [6,7]. All simulations are performed at pH neutral conditions and are isothermal at 298K.…”

Section: Dissolution Modelling In Aqueous Naclmentioning

confidence: 99%

Micro-scale computer modelling of the relationship between metallurgical microstructure and localized corrosion effects

Brown¹,

Barnard²

2007

WIT Transactions on Engineering Sciences, Vol 54

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An attempt is made to model the corrosion effects experienced by zinc and zinc-aluminium coating alloys in contact with conductive, chloride containing aqueous electrolytes. 3D predictions of localized corrosion of zinc alloy coatings are made using a control-volume finite difference approach, where an irregular structured mesh is employed. The model deals with the movement of multiple evolving conserved concentration fields. Perturbations in concentration are used to determine the conditions at an exposed surface, in addition to influencing any processes operating. The effect of coupled-materials and electrolyte present on the progression of localized corrosion processes is calculated using established relationships and experimentally derived data.Quantitative predictions of the corrosion performance at the exposed surface and cut-edge to electrolyte (used in the accelerated corrosion testing of these coating alloys) are made. Comparison is made to the predicted form of the current density fields around corroding surfaces and those observed experimentally. In addition, absolute metal losses calculated across exposed areas of the simulated alloys are compared with those estimated during experimental investigations.

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3D computer simulation of the influence of microstructure on the cut edge corrosion behaviour of a zinc aluminium alloy galvanized steel

Cited by 24 publications

References 11 publications

Towards multiscale modelling of localised corrosion

Towards multiscale modelling of localised corrosion

Investigation of self-healing mechanism on galvanized steels cut edges by coupling SVET and numerical modeling

Micro-scale computer modelling of the relationship between metallurgical microstructure and localized corrosion effects

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