SIMULATION OF CO2 CORROSION IN TURBULENT PIPE FLOW USING MECHANISTIC MODEL WITH VARIATIONS IN PH AND CO2 PARTIAL PRESSURE

• Main Author: Gratyanus Bebali Gea, Fidelity
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49448
• Institution: Institut Teknologi Bandung

Carbon dioxide corrosion contributes to more than half of the failure caused by corrosion in the oil and gas industry. One of the methods to prevent such failure is by predicting the corrosion rate. Recently, researches about CO2 corrosion prediction were leaning towards simulation using a mechanistic model. A mechanistic model is based on the phenomenon and physicochemical theory that occurs in the corrosion process. In this research, simulation using a mechanistic model of 1-dimensional uniform CO2 corrosion in turbulent pipe flow using COMSOL Multiphysics software was conducted. The main focus of the research is to understand the effect of operating conditions such as variation of pH at 4, 5, and 6 and CO2 partial pressure (pCO2) 0.1, 1, and 5 bar in a film-free and with film condition to the corrosion rate. Corrosion rate obtained by simulation shows good agreement with the experimental corrosion rate. The increase of carbon dioxide partial pressure results in a higher corrosion rate and as pH increases, corrosion rate decreases. In this research, concentration deviation from the bulk concentration and supersaturation level were shown. Variation of pCO2 and pH show the difference in concentration deviation of chemical species involved. Supersaturation level increases significantly with increasing pCO2 at pH 6. Through this research, it is hoped that it could be the starting point for developing research on corrosion simulation in Materials Engineering ITB.