US Marine Corps has incorporated the use of Volatile Corrosion Inhibitors VCIs into standard maintenance procedures. VCI adsorption onto a metallic surface was measured using a Scanning Kelvin Probe Technique. The presence of VCI resulted in a positive shift in the material work function. Possible causes of this shift are discussed. Exposure tests to simulate the aggressive environmental conditions which are faced by the USMC are presented. VCI performance was measured using weight loss. Results indicate that under immersion conditions or in environments where only water vapor is present, VCIs act to slow corrosion. However, in the presence of chloride containing salt, the addition of VCI can enhance corrosion processes. A Multielectrode Array Sensor (MAS) probe was used to measure corrosion rates within the signal lamp assemblies. The possibility of using this technique to measure corrosion rate in-situ is addressed.

Subject
Water, Salts, Corrosion rate, Metal surfaces, Probes, Mass loss, Volatile corrosion inhibitors, Salt solutions, Vapors, Steel, Corrosion probes, Immersion, Corrosion protection
Keywords:
VCI, Multielectrode array sensor, steel
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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