Corrosion inhibition is a complex phenomenon and depends on the formation of protective layers on the metal surface. Of the many factors that affect the protective nature of the surface layers, the incorporation of the inhibitor in the surface layer is the most important. The manner in which the inhibitor is incorporated in the surface layer leads to three types of inhibition namely - interface inhibition, interphase inhibition and precipitation coating.

Determining the composition of the surface layers of metals is facilitated by modern surface analytical techniques, such as X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), secondary ion mass spectrometry (SIMS) reflectance spectroscopy (RS) and electron microprobe analysis (EMPA). The roles of these modern surface analytical techniques are discussed with respect elucidating the interfacial inhibition of copper by mercaptobenzothiazole, interphase inhibition of mild steel AISI 1010 by oxyanions such as chromate, molybdate and tungstate and precipitation coating of AISI 1010 steel by oxalate in acid mine water.

Subject
Thin films, Ions, Metal surfaces, Chromium, Steel coupons, Microprobes, X-ray spectroscopy, Surface analysis, Chemical inhibition, Corrosion inhibitors, Surface layers, Steel, Samples
© 1988 Minister of Supply and Services Canada. 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 prior written permission. 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).
1988
Minister of Supply and Services Canada
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