The historical development of knowledge about the influence of the carbonate system on the corrosion of mild steel is discussed. The relationship between corrosion and carbonate species is shown. Because of the effect of the carbonate system in limiting the solubility of the primary products of iron metal corrosion and the capability for the production of stable strongly supersaturated calcium carbonate solutions, provided by threshold inhibitors, it is possible to use the dissolved oxygen to inhibit corrosion. Because of the use of scaling inhibitors, the importance of the indices in their original sense is overcome. The indices can, in principle, be replaced by other limiting concentrations which are more predictive with respect to corrosion.

Subject
Stability, Water, Corrosion rate, Calcium carbonate, Saturation, Iron, Solubility, Acidity, Corrosion inhibitors, Steel, Carbon dioxide, Oxygen, Corrosion protection
Keywords:
index, indices, corrosion, water, chemistry, carbonate, mild, steel, carbon, alkalinity
© 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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