Record Display for the EPA National Library Catalog


Main Title Copper-Induced Corrosion of Galvanized Steel Pipe.
Author Fox, K. P. ; Tate, C. N. ; Treweek, G. P. ; Trussell, R. ; Bowers, A. E. ;
CORP Author Southern California Metropolitan Water District, Los Angeles.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1986
Report Number EPA/600/2-86/056;
Stock Number PB86-208717
Additional Subjects Pipes(Tubes) ; Galvanized materials ; Corrosion ; Steels ; Copper ; Coatings ; Zinc ; Metal pipe ;
Library Call Number Additional Info Location Last
NTIS  PB86-208717 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 163p
An investigation was conducted to determine the cause(s) of rapid pitting failure of galvanized steel pipe used in consumer plumbing systems. The presence of copper in water and the character of the galvanized steel pipe were factors examined in detail. Pipe manufactured in Korea, Australia, and in the U.S. were compared for pipe structure and zinc coating. In pilot testing, increasing copper concentrations (from 0.0 to 5.0 mg/L) produced increased corrosion activity on the pipe surface as measured by greater deposition of scale, calcium, iron, zinc, and copper. Also, the ratio of iron surface area to zinc surface area increased. Other factors, such as the mode of exposure and the addition of citrate, had no measurable impact. The corrosion activity, as measured by scale formation, was greatest on the Korean pipe, followed by the U.S. and Australian. Rapid pitting of the sort observed in several southern California homes did not occur under any of the conditions tested.