Polymers containing appropriate functionality inhibit corrosion in aerated, aggressive test waters representative of open, recirculating cooling water systems. Three polymeric hydroxamic acid
derivatives were evaluated as candidate inhibitors, as well as styrene- and ethylene-maleic anhydride copolymers. Along other lines, polymeric organic phosphate esters were synthesized from guar, pectin, and hydroxyethyl-cellulose, and their behavior was compared with the inorganic phosphates: sodium orthophosphate and sodium hexametaphosphate. Three methods of evaluation were used in order to assess inhibitor performance: coupon immersion, recirculating loop studies and potentiodynamic polarization. These test methods are described in detail. They covered a wide range of environmental conditions in terms of solution flow rates, aeration, time frame, and ratio of specimen surface area:test solution volume. The influence of these inherent characteristics on the results (inhibitor performance expressed as percent inhibition relative to an uninhibited solution) is discussed.
Subject
Acids, Test methods, Inhibitor performance, Copolymers, Orthophosphate, Chelation, Polymers, Phosphates, Sodium, Corrosion inhibitors, Immersion, Corrosion coupons, Potentiodynamic polarization
© 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)
You do not currently have access to this content.