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TitlePitting of carbon steel heat exchanger tubes in industrial cooling water systems
Publication TypeJournal Article
Year of Publication2003
AuthorsLaycock, N., Hodges S., Krouse D.P., Keen D., and Laycock P.
JournalJournal of Corrosion Science and Engineering
Date Published2003
ISSN14668858 (ISSN)
KeywordsAmmonia, Borate minerals, Carbon steel, Chloride minerals, Cooling water chemistry, Corrosion, Environmental impact, Heat exchangers, Iron, Kinetic theory, Nickel, Nitric acid, Pitting, Pitting corrosion, sulfur, Tube bundle, Tube extraction, Water cooling systems
AbstractA model is described for the evolution of the maximum pit depth in carbon steel heat exchanger tubes exposed to industrial cooling water. This model assumes that pitting occurs only intermittently, during relatively short periods when the environmental conditions are outside the safe operating envelope. The model is discussed in relation to a survey of cooling water chemistry and heat exchanger inspection data from nine industrial plants, together with a laboratory investigation of pure iron in pH 8.4 borate buffer solution with and without 0.01 M chloride.

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