How Corrosive is Propylene Glycol to Hot-Dip Galvanized Steel?
According to Frank Porters book, Corrosion Resistance of Zinc and Zinc Alloys, propylene glycol will corrode zinc-coated steel less than 0.5 mil per year. Please note that temperature or concentration information are not given for this corrosion rate.
Corrosion Resistance of Zinc and Zinc Alloys, pg. 419
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