Since the introduction of shaft grounding of propellers and shafts of some Canadian Forces ships, increases in fouling of the propellers and in cathodic protection current requirements have been problems. To prevent fouling and reduce current requirements, two trials of propellers coated with the Canadian Naval standard underwater coating system were carried out between 1981 and 1986. After 2.5 years, a coated propeller on a Canadian Forces ship was in good condition with no fouling, and the only problem was paint loss in areas where cavitation occurred. Also, with a coated propeller, the current requirements of the underwater hull were reduced between 20% and 30%.

Subject
Electric current, Propellers, Paint removal, Water, Cathodic protection, Cathodic current, Roughness, Fresh water, Hull, Marine vessels, Risk reduction, Fouling, Paints
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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