Physico-chemical characteristics of corrosion scales in old iron pipes

P. Sarin, V. L. Snoeyink, J. Bebee, W. M. Kriven, J. A. Clement

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)2961-2969
Number of pages9
JournalWater Research
Volume35
Issue number12
DOIs
StatePublished - Jan 1 2001

Keywords

  • Corrosion
  • Corrosion scales
  • Enveloping layer
  • Iron oxides
  • Tubercles

ASJC Scopus subject areas

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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