Abstract
The effects of major ion composition, dissolved oxygen, pH, and dissolved inorganic carbon on the formation of calcareous deposits during the cathodic protection of steel in seawater at 25°C have been measured.
The presence of magnesium ion in seawater markedly increases current requirements for cathodic protection. It was found that the current density does not increase linearly with increasing oxygen concentration, but instead reaches a plateau at oxygen concentrations greater than air saturation. Current requirements for cathodic protection decrease at high pH, and a linear relationship between current density and the seawater carbonate ion concentration is observed.
© 1983 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).
1983
Association for Materials Protection and Performance (AMPP)
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