Desalination plants are mostly manufactured from metallic materials and corrosion plays an important part in determinating their life and reliability. The primary interest of plant designers and operators is to minimise corrosion in order to improve life and reliability, and less emphasis has been placed on the effects of corrosion products on the environment. This paper reviews known information on the corrosion behaviour of alloy materials in two important desalination processes, namely RO (reverse osmosis) and MSF (multi-stage flash) and considers the environmental effects of corrosion products. The main materials considered are the copper base alloys such as copper-nickels, and stainless steels. Details of alloy composition are given. Both these groups of materials are used in large amounts in desalination processes. Calculations have been carried out to estimate the levels of Fe, Cr, Ni and Mo which could enter the product stream and blowdown stream of a typical MSF plant as a result of passive current flow on Type 316L stainless steel. Results show that even with very conservative assumptions the estimated levels of Cr and Ni in the product water are an order of magnitude lower than levels allowed by the current standards for drinking water.


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    Title :

    Environmental aspects of corrosion in MSF and RO desalination plants


    Additional title:

    Umweltaspekt der Korrosion in MSF- und RO-Entsalzungsanlagen


    Contributors:
    Oldfield, J.W. (author) / Todd, B. (author)

    Published in:

    Desalination ; 108 , 1-3 ; 27-36


    Publication date :

    1997


    Size :

    10 Seiten, 12 Tabellen, 21 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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