Heat transfer fluids and corrosion inhibitor formulations for use thereof

摘要

Disclosed herein is a heat transfer fluid concentrate comprising: greater than or equal to 90 weight percent of a freezing point depressant; 16 to 80 ppm of magnesium ions; an azole compound; an inorganic phosphate; a carboxylate; and an acrylate based polymer, wherein the heat transfer fluid concentrate has a pH of 7-9.5 and the weight ratio of acrylate based polymer to magnesium ions is 1 to 25. The heat transfer fluid concentrate can be used to make a heat transfer fluid.

主权项

1. A heat transfer fluid concentrate comprising:
a freezing point depressant in an amount of 85 wt. % to 99 wt. % based on a total weight of the heat transfer fluid concentrate; a carboxylate in an amount of 1 wt. % to 10 wt. % based on the total weight of the heat transfer fluid concentrate; an inorganic phosphate in an amount of 0.10 wt. % to 0.60 wt. % based on the total weight of the heat transfer fluid concentrate; an azole compound in an amount of 0.01 wt. % to 3 wt. % based on the total weight of the heat transfer fluid concentrate; magnesium ions in an amount of 16 ppm to 80 ppm by weight of the heat transfer fluid concentrate; and an acrylate-based polymer in an amount wherein a ratio of the acrylate-based polymer to the magnesium ions is from 1 to 25.