As an alternative to the complete removal of oxygen from a boiler system by mechanical and chemical methods, some steam-water circuits are operated with the intentional presence and feed of oxygen. In twenty years of practical use in once-through type boilers, experiences with the feed of oxygen are good. The number of applications continues to grow.

This paper will discuss the conditions when oxygen is generally considered to be corrosive and when it can be considered to act as a corrosion inhibitor. The limits and the necessary conditions for the use of oxygen treatment, including the need for high purity water and strict analytical control, are also discussed.

Subject
Water, Corrosion rate, Oxide formation, Hydrogen peroxide, Iron, Acidity, Corrosion products, Feedwater, Boilers, Oxygen, Dissolved oxygen, Corrosion protection, Conductivity
Keywords:
Once-through type boilers, neutral-oxygen treatment, combined water treatment, corrosion product transport, oxygenated treatment, boiler feedwater, ferrous metallurgy
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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