A simple electrochemical model for internal corrosion of mild steel oil and gas pipelines is developed exclusively based on the public information. Well-known theories of corrosion are adapted as the theoretical basis of the model. This model enables the prediction of uniform corrosion rates resulting from carbon dioxide, hydrogen sulfide, acetic acid and/or oxygen presence in an aqueous solution. The contribution of various corrosive species on corrosion rate can be quantified and thus the dominant corrosion mechanism can be unveiled. The kinetics of film growth on metal surface can be simulated using plausible empirical correlations to enhance the practicality of the corrosion prediction.

This project was devised with the mission of providing the corrosion community with a freely available yet theoretically sound corrosion model. The source code, and all the background information, such as underlying theories, data used for calibration, known problems, limitations etc., will be freely shared with the users via a dedicated web site. The first version of the program is currently written using an Excel VBA framework for easy access and modification. Building of derivative works and add-on modules by third parties is encouraged and expected in further developments.