Vapor Corrosion Inhibitors (VCIs) possess the appreciable pressure of saturated vapors under normal atmospheric conditions. These vapors enrich the metal surface and provide corrosion protection by adsorption on it.

Corrosion testing can be performed in the laboratory under controlled conditions and in the field under natural or service conditions. In both the laboratory and field tests, corrosion rate can be evaluated by the direct determination of the metal loss or by measuring of corrosion current, corrosion potential, polarization resistance, and other electrochemical corrosion characteristics with electrochemical instruments.

Many standards and special tests and testing programs are utilized for evaluation of VCIs performance. For evaluation of the performance under natural conditions, special testing programs can be created. The paper presents the example of such a program and the data of this study. Corrosion protection provided by VCI vs. distance from its source was evaluated by corrosion monitoring, utilizing metal coupons and Corrosometer with special probs.

Subject
Films, Test methods, Materials, Corrosion rate, Containment, Corrosion testing, Volatile corrosion inhibitors, Vapors, Metals, Corrosion inhibitors, Corrosion probes, Corrosion protection, Relative humidity
Keywords:
Vapor corrosion inhibitor, corrosion tests, corrosion rate, corrosion protection, monitoring, coupons
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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