METHOD OF RETARDING CORROSION OF METAL SURFACES IN CONTACT WITH BOILER WATER SYSTEMS WHICH CORROSION IS CAUSED BY DISSOLVED OXYGEN

摘要

66530-500 New oxygen scavengers for boiler waters have been discovered, which oxygen scavengers are based upon N, N, N', N'-tetra substituted phenylenediamines. These compounds provide oxygen scavenging capabilities, metal passivating capabilities, volatility such that condensate systems in an operating boiler are protected, and may be formulated with other oxygen scavengers and other common treatment agents used in boiler waters. The preferred tetra substituted phenylenediamines are N, N, N', N'-tetramethyl-1,4-phenylenediamines, or its precursors.