Electronic systems inside a military shelter are susceptible to electromagnetic and radio frequency interference (EMI/RFI) generated from electrical and electronic equipment. A conductive sealant is necessary at the seams and joints to preserve continuity of current flows in a shelter. Traditionally, silver plated-copper filled silicones are used to seal seams and joints. A nonconductive polysulfide is normally used as a covercoat to provide paint adhesion. Several commercially available conductive sealants were evaluated to select a sealant that is paintable, easily processable, corrosion resistant, and able to provide long term shielding effectiveness. A nickel filled polythioether was selected as a replacement conductive sealant. The sealant was chosen based upon its relatively low cost, excellent corrosion resistance, and superior shielding effectiveness.

Subject
Test methods, Materials, Aluminum, Joints, Interfaces, Sealants, Shielding, Polysulfides, Salt spray corrosion testing, Attenuation, Corrosion resistance, Copper, Nickel
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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