SYMPOSIA PAPER Published: 01 January 1999

Silicate Stabilization Studies in Propylene Glycol


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.

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Schwartz, SA
ARCO Chemical Company, Newtown Square, PA
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Developed by Committee: D15
Pages: 327–351
DOI: 10.1520/STP38255S
ISBN-EB: 978-0-8031-5566-4
ISBN-13: 978-0-8031-2610-7