Compatibility of Motor Materials with Polyolester Lubricants : Effect of Moisture and Weak Acids


This paper discusses the effects of various levels of acid and moisture in a Polyol Ester(POE) lubricant on the compatibility of motor insulation materials. Thirteen motor insulation materials were exposed to R-134a I POE lubricant combinations with four levels of acid and moisture for 500 hours at 1270C(260 °F). The moisture levels were <50 ppm to 500 ppm… (More)

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