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MM: Fachverband Metall- und Materialphysik

MM 15: Poster session I

MM 15.26: Poster

Montag, 7. März 2016, 18:00–20:00, Poster B3

Corrosion scale dynamics — •Markus Tautschnig, Nicholas Harrison, and Michael Finnis — Imperial College London

The presence of solid corrosion products, such as iron sulphides and iron carbonates, can lead to a significant reduction in the corrosion rate. Therefore, a fundamental understanding from the atomistic to the continuum level of their formation, stability and growth behaviour is vital for the oil and gas field equipment sustainability.

A "hexagonal slab" mesoscale growth model is being developed. This model has been created in order to predict the growth rate for scales with mesoscale morphology in various chemical environments. Assuming a dense and adherent scale, grain boundaries are considered as preferential pathways for the transport of charged point defects through the scale. The model includes the long range Coulomb interaction between the moving charged defect species. Migration-reaction-diffusion is simulated for the model geometry. The equations for the mobile species are solved numerically with a novel C++ code. Time dependent concentration profiles throughout the grain boundaries can be calculated.