The pipeline is blocked; the test result shows aluminum stearate
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There are two closed-loop management cooling systems; the main materials used for fluid contact are rubber, aluminum alloy, and stainless steel. The fluid used is ethylene glycol mixed with water, and the brand of this fluid is Antifrogen N. The first system operated for 3 months before its filter became clogged – the substance responsible for this clogging was aluminum stearate. The filter became clogged again after another month. The second set got clogged after just 1 month of use. The shape of the obstructions is basically the same. Where did the blockage come from? How to determine the source of the blockage?
This post was last edited by zdl1966 on 2018-11-15 at 20:28. Stearates may come from rubber, and ethylene glycol aqueous solutions are somewhat corrosive. The stabilizer stearate in the rubber precipitates out.