Tests were carried out off the northern Norwegian coast (Tromsøflaket and Haltenbanken). Zinc anode/cathode assembles connected to an automatic logging unit were exposed at a depth of 150 metres. Data registered by the logging unit included protection potential, cathodic protection current and environmental data (seawater temperature, magnitude and direction of seawater currents). In addition weight-loss samples were exposed to determine the corrosion rate of steel as a function of depth. A comparison with results from similar tests carried out in the North Sea area indicate that higher design current densities are necessary to obtain adequate polarization at great depths off the Norwegian coast.

Subject
Electric current, Steel surfaces, Water depth, Water, Cathodic protection, Corrosion currents, Corrosion rate, Cathodic current, Seawater, Cathodic current density, Steel, Oxygen, Protection potential
© 1984 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).
1984
Association for Materials Protection and Performance (AMPP)
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