High lead solder corrosion inhibitors

摘要

Compositions and method of using said compositions for inhibiting mineral scale and the corrosion of high lead solder and the cavitation-erosion corrosion of aluminum in aqueous systems are disclosed. Unexpectedly, a mixture of a siloxane-silicate copolymer with an azole is effective in reducing the corrosion of high lead solder and aluminum, particularly the cavitation-erosion corrosion of aluminum in contact with aqueous liquids, such as aqueous alcohol solutions used as heat transfer media. Antifreeze concentrates and a process for inhibiting corrosion are also disclosed.