Green corrosion inhibitors have been developed to minimize environmental impacts. The first requirement of green chemicals is to pass pre-screening based on the criteria of Harmonised Mandatory Control Scheme. In addition, a green chemical should have a Hazard Quotient value of less than 1 for the UK sector; whereas in Norway, a low or reduction in the contribution to an operator’s platform Environmental Impact Factor is required. Localized corrosion test protocols were adopted as part of an assessment of the effectiveness of corrosion inhibitor in laboratory tests. This paper discusses some aspects of the evaluations of corrosion inhibitors using recessed micro-electrodes and segmented weld electrode assemblies in simulated oil and gas production environment. Some examples of the applications of corrosion inhibitors to protect against under-deposit pitting and preferential weld corrosion are presented. The merits of different test methodologies are discussed.

Subject
Working electrodes, Inhibitor performance, Corrosion rate, Scale inhibitors, Jet impingement, Corrosion inhibitors, Pitting, Corrosion protection, Localized corrosion, Risk reduction, Galvanic current, Electrodes, Concentration cells
Keywords:
Localized corrosion, underdeposit corrosion, preferential weld corrosion, corrosion inhibitors
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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