Water treatment agent and water treatment method for a boiler
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United States of America Patent
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Dec 8, 1992
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N/A
app pub date -
Nov 26, 1991
filing date -
Jul 14, 1989
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Abstract
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: H.sub.2 H(CH.sub.2 CH.sub.2 NH).sub.n H (I) (wherein n denotes an integer of 2 to 5), and a water treatment method for pure water boilers or soft 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.
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