| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment agent and a control method of cooling water or the like, capable of suppressing formation of slime, attachment of scale and corrosion. SOLUTION: The water treatment agent comprises an aqueous solution containing a water-soluble polymer, oxycarboxylic acid, an azole compound, an isothiazoline compound, and a phosphon compound as effective components. The agent is used in a state of keeping concentrations of the water-soluble polymer, oxycarboxylic acid, the azole compound, isothiazoline compound and phosphon compound, equal to or more than 12 mg/L, 10 mg/L, 1 mg/L, 0.3 mg/L, and 8 mg/L, respectively. COPYRIGHT: (C)2009,JPO&INPIT
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