An experimental set up comprised of API X-52 steel samples exposed to Cl-, and CO2 solutions under different flow conditions were used to analyze structural safety of this material under simulating pipeline working conditions. The failure probability of a steel pipe is calculated considering that the material forms part of a long metallic structure, with corrosion as the main cause of deterioration of the pipeline structure; and analyzed from directional simulation assuming chemical and mechanical factors affecting the structure. Corrosion rates are calculated from the Electrochemical Impedance Spectroscopy (EIS) technique and expected life is estimated by reliability analysis method, applied for laboratory conditions of steel exposed in brine solution with different CO2 compositions and different flow rates.

Subject
Materials, Piping, Degradation, Reliability, Corrosion rate, Pipelines, Probability, Stress, Material degradation, Sodium chloride solution, Mechanical failure, Fluids, Steel
Keywords:
Corrosion rates, flow conditions, directional simulation, life prediction
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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