title: Physico-chemical characteristics of corrosion scales in old iron pipes.
abstract: Corrosion scales play an important role in modifying water quality in drinking water distribution systems. The corrosion scales from old iron/steel pipes were analyzed for their structure and composition. Scales were studied both before and after drying. and goethite, magnetite and lepidocrocite were identified as the primary constituents of the dried samples. High concentrations of readily soluble ferrous phases were detected in wet-scale samples. The corrosion scales had a shell-like, enveloping layer, covering porous deposits of iron oxide phases. Our studies were able to identify important differences between corrosion scales found in two different water distribution systems. Further studies are needed to establish the role of corrosion scales in the mechanism of iron release from corroded pipes.
authors.affiliation: Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 61801, USA.
authors.forename: P
authors.initials: P
authors.lastname: Sarin
authors.forename: V L
authors.initials: VL
authors.lastname: Snoeyink
authors.forename: J
authors.initials: J
authors.lastname: Bebee
authors.forename: W M
authors.initials: WM
authors.lastname: Kriven
authors.forename: J A
authors.initials: JA
authors.lastname: Clement
mesh_terms: D003343:Corrosion; D003720:Densitometry; D005290:Ferric Compounds / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D058085:Iron Compounds / Q000737:chemistry; D008956:Models, Chemical; D010100:Oxygen / Q000378:metabolism; D016062:Porosity; D012212:Rheology; D012498:Sanitary Engineering; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D005290:Ferric Compounds; D058085:Iron Compounds; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D007501:Iron; D010100:Oxygen