A common, and probably the most critical corrosion problem faced by all direct current-powered transit systems is that of stray current corrosion. The transit system of The Metropolitan Atlanta Rapid Transit Authority (MARTA) is representative of modern transit systems using direct current traction power and having an ungrounded traction power circuit. This paper reviews the MARTA project from concept to system operation and examines issues relevant to the effectiveness of the Authority's corrosion control program. Emphasized are the design philosophy behind the stray current program and the practical considerations required to implement it.

Subject
Ballast, Rail, Test methods, Substations, Isolation, Structures, Traction, Stray current, Construction, Corrosion protection, Maintenance, Fasteners, Negative return
© 1982 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).
1982
Association for Materials Protection and Performance (AMPP)
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