Characteristics of iron corrosion scales established under blending of ground, surface, and saline waters and their impacts on iron release in the pipe distribution system

    Authors

    Z. J. Tang; S. K. Hong; W. Z. Xiao;J. Taylor

    Comments

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    Abbreviated Journal Title

    Corrosion Sci.

    Keywords

    iron corrosion; water blending; XRD; RMS; XPS; siderite; CARBON-STEEL; PRODUCTS; REDUCTION; LAYER; RUST; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

    Abstract

    Interior scales on PVC, lined ductile iron (LDI), unlined cast iron (UCI) and galvanized steel (G) were analyzed by XRD, RMS, and XPS after contact with varying water quality for I year. FeCO3, alpha-FeOOH, beta-FeOOH, gamma-Fe2O3, Fe3O4 were identified as primary UCI corrosion products. No FeCO3 was found on G. The order of Fe release was UCI > G > = LDI > PVC. For UCI, Fe release decreased as % Fe3O4 increased and as % Fe2O3 decreased in scale. Soluble Fe and FeCO3 transformation indicated FeCO3 solid was controlling Fe release. FeCO3 model and pilot data showed Fe increased as alkalinity and pH decreased. (C) 2005 Elsevier Ltd. All rights reserved.

    Journal Title

    Corrosion Science

    Volume

    48

    Issue/Number

    2

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    322

    Last Page

    342

    WOS Identifier

    WOS:000235462500004

    ISSN

    0010-938X

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