Results of tests with three non-chromate cooling water treatment programs in a model, open recirculating cooling water system1  are reported. The paper deals with the rate of inhibitor film formation under normal operating conditions and the rate of film breakdown under stressed conditions corresponding to loss of inhibitor and dispersant feed. The test rig utilized instantaneous corrosion rate monitoring with timed-rate data logging as well as conventional corrosion coupons, a test heat exchanger, and electrically heated tubular specimens. The programs tested are identified as (A) : phosphonate-zinc (PZ); (B) : stabilized phosphate/polymer (SPP) , and (C): "all-organic" based on hydroxy-phosphonic acid (AO).

Subject
Water, Inhibitor performance, Corrosion rate, Inhibitor films, Tubes, Heat exchangers, Film formation, Weight loss, Heat, Corrosion inhibitors, Corrosion data, Corrosion protection, Oil
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
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