method for the treatment of boiler feed water.

摘要

A water treatment agent for boilers which comprises as active ingredients a compound which can release aliphatic hydroxycarboxylic acid ions in water and a polyamine represented by the following formula (I) or an acid addition product thereof: H2N(CH2CH2NH)nH (I) (wherein n denotes an integer of 2 to 5), and a water treatment method for pure water boilers or soft water boilers using the above active ingredients to prevent corrosion of the ferrous metal in the water system of the pure water boilers or soft water boilers.