In this paper a two-dimensional (2-D) stochastic localized CO2 corrosion model is proposed, which describes the balance of two processes: corrosion (leading to metal loss) and precipitation (leading to metal protection). The model is able to predict localized corrosion of carbon steel in CO2 containing environments.

The model uses corrosion rate and surface-scaling tendency predicted by a 1-D mechanistic corrosion model as the inputs. It can predict the possibility of localized corrosion as a function of primitive parameters such as temperature, pH, partial pressure of CO2, velocity, etc. The maximum pit penetration rate as well as the uniform corrosion rate can be predicted and used to describe the severity of the localized attack.

Subject
Precipitation (solids), Corrosion rate, Predicted corrosion rate, Uniform corrosion rate, Iron carbonate films, Protective films, Algorithms, Corrosion attacks, Penetration, Corrosion modeling, Film formation, Localized corrosion, Pitting factor
Keywords:
localized corrosion, model, stochastic, pitting, iron carbonate, scaling tendency, carbon steel
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2005
GOV
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