Chemical applications as corrosion inhibitors are widely adopted in production and processing operations in the Oil and Gas Industry. Particularly challenging is the protection of materials at and near the welds and joints from preferential corrosion and, especially, under conditions of high flow and high sheer. Additionally, successful application to gas production can also be difficult, as most inhibitors are designed to be oil and / or water-soluble.

This paper outlines the development of an inhibitor class which demonstrates good general inhibitor performance in gas lines, shows good filming characteristics under conditions of high sheer and also appears to exhibit preferential protection at weldments. The paper will discuss the laboratory testing methods employed and detail the in field performance of the chemistry. The paper will explore a rational for further development and experimental work. Due to reasons of commercial confidentiality the paper will not disclose the detailed nature of the proprietary chemistry involved.

Subject
Corrosion rate, Parent metals, Impedance, Dosages, Shear, Film formation, Corrosion inhibitors, Brines, Corrosion protection, Corrosion resistance, Galvanic current, Galvanic corrosion, Electrodes
Keywords:
carbon dioxide, oil field corrosion, corrosion inhibitor, welds
© 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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