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

35 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

Bibliographical note

Funding Information:
Support for this research was provided by Tampa Bay Water (TBW), and AWWA Research Foundation (AwwaRF). The authors specially acknowledge Roy Martinez, AwwaRF Senior Account Officer, who was the Project Officer, and Chris Owen, TBW Quality Assurance Officer. The TBW Member Governments: Pinellas County, Hillsborough County, Pasco County, Tampa, St. Petersburg, and New Port Richey; and the AwwaRF Project Advisory Committee are recognized for their review and recommendations. Pick Talley, Robert Powell, Dennis Marshall and Oz Wiesner from Pinellas County, and Dr. Luke Mulford from Hillsborough County are also specifically recognized for their contributions. UCF Environmental Engineering graduate students, especially Jorge Arevalo and faculty who worked on this project are recognized for their efforts.

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

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

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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