STP1335: Silicate Stabilization Studies in Propylene Glycol

    Schwartz, SA
    Research advisor, ARCO Chemical Company, Newtown Square, PA

    Pages: 25    Published: Jan 1999


    Abstract

    In most North American and many European coolant formulations, the corrosion inhibition of heat-rejecting aluminum surfaces is provided by alkali metal silicates. But, their tendency towards polymerization, leading to gelation and/or precipitation, can reduce the effectiveness of a coolant. This paper presents the results of experiments which illustrate formulation-dependent behavior of inorganic silicate in propylene glycol compositions. Specific examples of the effects of glycol matrix, stabilizer type, and hard water on silicate stabilization are provided.

    Keywords:

    aluminum corrosion, alkali metal silicates, organosilicon stabilization, hard-water stability, mineral scale deposition


    Paper ID: STP38255S

    Committee/Subcommittee: D15.19

    DOI: 10.1520/STP38255S


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