A new type of electrical resistance atmospheric corrosion sensor is described that was tested in-situ with a printed circuit board (PCB). Electrical resistance changes are reported per changes in decreasing electrode thickness that support thickness losses due to corrosion. Micrographs showing the cross sections of the substrate and corrosion products on the PCB and a copper electrode corrometer support the loss in thickness. The test conditions consisted of cycled temperatures between ambient and 50° C along with the respective relative humidity between 60 and 100% in a hydrogen sulfide atmosphere. The corrosion sensor reports respective film thickness losses by a visual color display.

Subject
Hydrogen sulfide, Sensors, Materials, Manufacturing, Reliability, Substrates, Slopes, Corrosion products, Equipment, Corrosion resistance, Copper, Electrodes, Relative humidity
Keywords:
corrosion, atmospheric, monitor, copper, electronics, solder, hydrogen sulfide, humidity, temperature
© 2002 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).
2002
Association for Materials Protection and Performance (AMPP)
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