Various corrosion preventive measures for copper alloy condenser tubes were evaluated with reference to the experiences in the power plants and experimental investigations in Japan. Measures discussed were (1) artificial protective film (APF) of thin layer of resin, (2) AP bronze tube with improved resistance against polluted sea water, (3) cupronickel tubes modified with addition Fe2+ chromium (CA72200) or with increased addition of solutionized iron, (4). Fe2+ injection into sea water to form the protective film, (5). cathodic protection to prevent the corrosion at tube ends, (6) on-load monitoring of protective film by means of measurement of polarization resistance, (7) modified screen system to avoid the lodgement of foreign bodies in tubes, (8) Optimum sponge ball cleaning to avoid both of fouling and corrosion of condenser tubes. Particular emphasis was laid on their useful range and limits of application. It was concluded that available range of countermeasures should be applied with the thorough understanding of stability of protective film under the conditions expected.

Subject
Corrosion prevention, Water, Cathodic protection, Aluminum, Tubes, Protective films, Copper alloys, Condensers, Corrosion attacks, Film formation, Power plants, Brass, Erosion corrosion
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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