Patent ID: 9598664
Date: 2017-03-21
CPC Classifications: B08B,C11D

Claim:
1. A heat transfer system conditioner for use in a heat transfer system that has been pre-treated with a cleaning solution, the heat transfer system conditioner comprising: a) water; b) a water soluble alkaline metal phosphate; c) one or more azole compounds; and d) optionally, a corrosion inhibitor, scale inhibitor, acid neutralizer, colorant, surfactant, antifoam, stop-leak agent, or combinations thereof; the cleaning solution comprising: a) greater than 15 weight percent of a freezing point depressant based on total weight of the cleaning solution; b) oxalic acid in an amount ranging from about 8 to about 35 weight percent or from about 5 to about 10 weight percent based on total weight of the cleaning solution; and c) an azole compound;