Method for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavenger

摘要

A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: <IMAGE> wherein each of R1, R2 and R3 which may be the same or different represents hydrogen, alkyl of 1 to 8 carbon atoms or aryl or a water soluble salt thereof or a precursor thereof, and a tannin in a weight ratio of at least 2:1. This is particularly useful for boiler water systems.