Ozone is currently being considered as a possible replacement for chlorine based compounds as a biocide. Yet, a review of current literature related to the corrosion behavior of metals and alloys exposed to ozonated solutions indicates that there is considerable confusion concerning the effects of this strong oxidant. Some studies indicate that dissolved ozone will increase the corrosion rates of alloys such as carbon steel or brasses when compared to aerated solutions. Others indicate a beneficial effect of ozone, while still others indicate a neutral effect. Virtually all of these reports are for fresh waters, few relate to localized corrosion behavior, and most are anecdotal in that they report observations from service conditions with poorly defined variables. This review attempts to summarize the various corrosion rates reported in the literature, as well as present data obtained in laboratory studies of metals exposed to ozone in chloride containing environments, including artificial sea water.

Subject
Pits, Marine environments, Water, Corrosion rate, Passive films, Ozone, Copper alloys, Crevice corrosion, Steel, Oxygen, Copper, Stainless steel, Corrosion potential
Keywords:
ozone, cooling water systems, corrosion control, biofouling control, oxidizing biocide, sea water
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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