An under deposit corrosion test method has been developed where three carbon steel specimens are mounted together in an assembly. Two of the specimens are covered by sand or another deposit, while one specimen is not covered. The potential difference and galvanic current between sand covered and not covered specimens is measured. The corrosion rate of all three specimens is measured by linear polarization resistance measurements, while the galvanic current is measured by zero resistance ammetry. The paper summarizes the test method and presents experience in using the test method for both film-forming inhibitors and pH stabilization.

Subject
Test methods, Steel surfaces, Inhibitor performance, Sand, Corrosion rate, Free corrosion potential, Corrosion attacks, Corrosion inhibitors, Deposit corrosion, Galvanic current, Linear polarization resistance, Polarization resistance, Concentration cells
Keywords:
carbon dioxide corrosion, corrosion inhibition, sand deposits, galvanic corrosion
© 2011 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).
2011
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.