Contribution of cellular automata to the understanding of corrosion phenomena

• Дата: 2017
• Автори: Zenkri, M., D. di Caprio, Pérez-Brokat, C., Féron, D., J. de Lamare, Chaussé, A., F. Ben Cheikh Larbi, Raouafi, F.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут фізики конденсованих систем НАН України 2017
• Назва видання: Condensed Matter Physics
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/157016
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Contribution of cellular automata to the understanding of corrosion phenomena / M. Zenkri, D. di Caprio, C. Pérez-Brokate, D. Féron, J. de Lamare, A. Chaussé, F. Ben Cheikh Larbi, F. Raouafi // Condensed Matter Physics. — 2017. — Т. 20, № 3. — С. 33802: 1–13. — Бібліогр.: 71 назв. — англ.

We present a stochastic CA modelling approach of corrosion based on spatially separated electrochemical halfreactions, diffusion, acido-basic neutralization in solution and passive properties of the oxide layers. Starting from different initial conditions, a single framework allows one to describe generalised corrosion, localised corrosion, reactive and passive surfaces, including occluded corrosion phenomena as well. Spontaneous spatial separation of anodic and cathodic zones is associated with bare metal and passivated metal on the surface. This separation is also related to local acidification of the solution. This spontaneous change is associated with a much faster corrosion rate. Material morphology is closely related to corrosion kinetics, which can be used for technological applications.