The writers conducted experiments in a test heat exchanger system to evaluate ten non-chemical scale and corrosion control devices. These devices are claimed to perform either by electrostatic, magnetic, electronic or catalytic mechanisms. Tests were also performed using chemicals to compare the results with non-chemical systems and to insure that the test conditions were not so severe that scale prevention was impossible. Water from a single deep well was used in all the tests. This water was known to cause calcium carbonate scale when heated. The test heat exchanger was a 2-tube shell and tube type with steam applied to the shell side. Water flow was either in series or parallel through the two tubes, depending upon the desired test conditions. None of the devices tested reduced the amount of scale formed significantly, compared to the controls. Proprietary chemicals containing phosphorus reduced scale formation almost completely.

Subject
Corrosion prevention, Water, Corrosion rate, Calcium carbonate, Tubes, Water flow, Carbonate scales, Corrosion scales, Scale formation, Equipment, Scale, Copper, Fouling
© 1985 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).
1985
Association for Materials Protection and Performance (AMPP)
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