Industrial and other commercial facilities often require installing cathodic protection on non isolated structures such as chilled water lines, bare piping of various types and underground storage tanks. Often, because of the large amount of metal that is interconnected to the protected structures, the 100mV cathodic protection criterion is the only one that is practicable. This paper describes the testing required for this criterion, half cell placement, determination of the formation or decay of polarization and the accuracy of taking IR drop free (“instant off”) readings. Case histories concerning a large industrial plant, a gasoline service station and a sewage lift station are described

Subject
Steel structures, Underground structures, Voltage drops, Water, Piping, Cathodic protection, Sewage, Structures, Impressed current anodes, Rectifiers, Impressed current, Polarization, Half cells
Keywords:
cathodic protection criteria, gasoline service stations, industrial plants, one hundred mV polarization, retrofitting cathodic protection, sewage lift stations
© 2001 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).
2001
Association for Materials Protection and Performance (AMPP)
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