The results of a two-year study of corrosion and corrosion protection characteristics of ductile iron pipe are presented. Included are field and laboratory evaluations related to short term and long term polarization rates under varying conditions; corrosion rate reduction and corresponding cathodic current criterion; and the corrosion protection benefits of the traditional, standard asphaltic shop coating. This information was then analyzed in conjunction with an extensive database from 1379 physical inspections of buried iron water lines. The result of the study is a risk based corrosion protection design strategy for buried ductile iron pipelines.

Subject
Piping, Cathodic protection, Corrosion currents, Corrosion rate, Cathodic current, Pipelines, Ductile iron pipe, Polyethylene encasement, Corrosion protection, Polarization, Electrical resistance, Soil, Shop coats
Keywords:
Ductile Iron, Ductile Iron Pipe, Corrosion of Ductile Iron Pipe, Coating of Ductile Iron Pipe, Cathodic Protection of Ductile Iron Pipe, Corrosion Protection Design Decision Model
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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