Kurita Water Industries Ltd.

Shinji Ano

Takao Tsuneki

Takahiko Uchida

Tomoyasu Imai

Masaru Okamoto

Hiromi Murakami

Hideo Ohtaka

Metal materials in contact with aqueous systems are prevented from corrosion by a method which comprises adding a copolymer having a molecular weight in the range of 1,000 to 20,000 and formed between isobutylene and at least one member selected from among maleic acid, water-soluble salts thereof, and maleic anhydride to water of such quality that the Langelier index thereof is not less than 1.5 and the relation,

Method for corrosion inhibition of metals

A water treatment agent to be used by adding it to water systems, such as, those in boiler plant and water cooling circulation system, for preventing both corrosion and scale formation on the metal surfaces held in contact with water in the water systems, comprising, as effective components, a polymer product having maleic acid or maleic anhydride unit and a polymer product having acarylamide or methacrylamide unit.

Water treatment agent

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Yokohama, Japan

Shinji Ano