Effects of blending on surface characteristics of copper corrosion products in drinking water distribution systems

Weizhong Xiao, Seungkwan Hong, Zhijian Tang, Sudipta Seal, James S. Taylor

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Copper scales formed over 6-months during exposure to ground, surface and saline waters were characterized by EDS, XRD and XPS. Scale color and hardness were light red-brown-black/hard for high alkalinity and blue-green/soft for high SO4 or Cl waters. Cl was present in surface or saline copper scales. The Cu/Cu2O ratio decreased with time indicating an e transfer copper corrosion mechanism. Cu2O, CuO, and Cu(OH)2 dominated the top 0.5-1 A° scale indicating continuous corrosion. Cu2O oxidation to CuO increased with alkalinity, and depended on time and pH. Total copper release was predicted using a Cu(OH)2 model.

Original languageEnglish
Pages (from-to)449-468
Number of pages20
JournalCorrosion Science
Volume49
Issue number2
DOIs
Publication statusPublished - 2007 Feb

Keywords

  • A. Copper
  • B. Modelling studies
  • B. XPS
  • B. XRD
  • C. Corrosion potential

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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