SYMPOSIA PAPER Published: 01 December 1956

Chapter VII—Sampling and Identification of Water-Formed Deposits


Water-formed deposits usually are not homogeneous. Inorganic deposits may be formed by reaction between the water or its solutes and the containing vessel or piping, and by reaction between solutes in the water. Biological types grow by consuming the required nutrients from water and, like inorganic deposits, may be deposited where formed or carried in suspension and later deposited some distance away. Chemical and physical changes in the operation of the water system may alter the site and character of deposits either temporarily, cyclically, or permanently. Determination of the average chemical composition of the resultant mixture therefore is of limited help in diagnosing the cause, or in providing a means for prevention, of a water-formed deposit.

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Developed by Committee: D19
Pages: 101–116
DOI: 10.1520/STP41186S
ISBN-EB: 978-0-8031-5927-3
ISBN-13: 978-0-8031-6081-1