A methodology based in electrochemical noise was implemented to assess pitting resistance of CRA materials at conditions associated to aggressive gas wells. The experiments were carried out at high CO2 partial pressures and temperatures and at different concentrations of chloride ions. The methodology allows defining the onset of pitting reliably and the results showed significant differences in the performance of the materials evaluated. This methodology can be used to complement studies on the materials selection for specific oil well applications

Subject
Pits, Electric current, Materials, Voltage, Electrochemical noise, Autoclaves, Sodium chloride solution, Current densities, Pitting, Corrosion resistance, Stainless steel, Electrodes, Electrode potential
Keywords:
electrochemical noise, pitting, CO2 corrosion, corrosion resistant alloys, stainless steel, 13 Cr, 22 Cr, Duplex
© 2001 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).
2001
Association for Materials Protection and Performance (AMPP)
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