A mechanistic model for predicting carbon dioxide corrosion in single-phase flow has been extended to predict CO2 corrosion in multiphase flow. Mass transfer in multiphase flow has a strong influence on corrosion rate. Previous studies used correlations to predict mass transfer in multiphase flow. In this work, a mechanistic model has been developed for predicting mass transfer coefficients in vertical multiphase flow. The similarities between heat and mass transfer mechanisms are utilized in the development of the new mechanistic model. The model was first evaluated by comparison with heat/mass transfer experimental data obtained from the literature. The model showed better overall performance than existing correlations, based on comparisons with the experimental data. Next, experimental data were gathered on CO2 corrosion under non scale forming conditions. The results of the CO2 corrosion rate predictions, using the newly developed mechanistic model, were in agreement with the experimental data.

Subject
Mechanistic models, Piping, Correlation, Corrosion rate, Predicted corrosion rate, Slug flow, Gas velocity, Liquids, Mass transfer, Multiphase flow, Experimental data, Mass transfer coefficient, Heat
Keywords:
CO2 corrosion, mass transfer, multiphase flow, predict corrosion rates
© 2006 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. 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).
2006
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.