Corrosion between aluminum substrates and EMI shielding gaskets is driven by galvanic action. Corrosivity of the gaskets toward aluminum flange material is evaluated by several methods including visual observation and weight loss measurements. A stable, conductive coating applied between the gasket and the aluminum can protect the aluminum against corrosion. However, defects in these coatings can lead to loss of protection and even accelerate corrosion. This paper describes the evaluation of stable coatings formulated with corrosion inhibitors that can protect aluminum even in the presence of defects.

Subject
Primers, Zinc rich coatings, Materials, Aluminum, Spray coating, Gaskets, Flanges, Polyurethane coatings, Shielding, Powders, Salt spray corrosion testing, Corrosion protection, Copper
Keywords:
Conductive Coating, Conductive Gaskets, Galvanic Corrosion, Stabilized Copper, Corrosion Inhibitors, Triazoles, Chromate, Aluminum Protection
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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