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    New Developments in Test Technology for ASTM C 692 (Preproduction Corrosion Test for Insulation To Be Used on Austenitic Stainless Steel)

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    Significant improvements have been made in the test procedures used in ASTM C 692 which deal with preproduction testing of wieking-type insulation for use on austenitic stainless steel. A drip procedure which literally turns the apparatus upside down has been found to be more reproducible as well as more realistic in terms of how insulation is actually contaminated in a realuse situation. The new procedure employs a steam-heated pipe to heat the coupons and thus provides far greater temperature uniformity than previously. The drip method controls the amount of liquid applied to each coupon to ± 10%, a much closer control than was possible with the previous wicking method. Correlations between the old and new procedures are provided. In addition to improvements in the test protocol, procedures for the metal qualification test have been vastly improved.


    preproduction corrosion test, ASTM C 692, external stress corrosion cracking, chloride

    Author Information:

    Whitaker, TE
    Fibreboard Corporation, Fruita, CO

    Whorlow, KM
    Fibreboard Corporation, Fruita, CO

    Hutto, FB
    Fibreboard Corporation, Fruita, CO

    Committee/Subcommittee: C16.16

    DOI: 10.1520/STP23340S