Cathodic protection combined with organic coating is the normal way to protect structures exposed to seawater against corrosion. The oil and gas industry is moving to deeper waters with pipelines and production systems located on the sea bottom, often far away from shore. Seawater temperature down to -10C is occurring in these deep waters. This paper presents results from carbon steel specimens polarized in the range -800 - -1100 mV SCE in natural seawater at temperature 00C for periods up to 8 weeks. Results from short term exposure of specimens at 70C are also included for comparison. Current density values will be presented. In addition the composition of calcareous deposits on the surface will be described.

Subject
Scanning electron microscopy, Steel surfaces, Water depth, Cathodic protection, Cathodic potential, Seawater, Current densities, Cathodic current density, Carbon steel, Corrosion protection, Risk reduction, Calcareous deposits, Test specimen
Keywords:
Cathodic protection, cold seawater, current density, calcareous deposit, arctic regions
© 2009 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).
2009
Association for Materials Protection and Performance (AMPP)
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