Protecting ductile iron water mains: what protection method works best for what soil condition?

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TypeArticle
Journal titleJournal of the American Water Works Association
Volume95
IssueNov. 11
Pages110125; # of pages: 16
SubjectWater mains
AbstractDuctile iron replaced grey cast iron as pipe material in the early 1970s. It has been estimated that almost half of all new water mains in North America are ductile iron. The main cause of the structural deterioration of all metallic mains is external corrosion, which is induced by environmental and operational conditions. Internal corrosion, on the other hand, can cause significant functional (hydraulic, water quality) deterioration within the distribution system. Methods for external corrosion protection include passive (coatings, wraps, etc.), active (cathodic protection) or a combination of both. Successes and failures have been reported on the usage of various methods under different conditions and circumstances. This paper provides the state of the practice in corrosion protection of ductile iron water mains, and describes case histories that have been reported from around the world. Some conclusions are drawn as to the suitability of methods to specific circumstances.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number45225
14282
NPARC number20386481
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Record identifiere450a75e-fd1b-429e-99d5-14e45d5e5ec4
Record created2012-07-25
Record modified2016-05-09
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