| 摘要 |
<p>A cooling fluid composition containing a glycol as a primary component, which further comprises (a) 0.1 to 10 wt % of at least one of alkylbenzoic acids and salts thereof, (b) 0.01 to 0.5 wt % of 2-phosphonobutane-1, 2, 4-tricarboxylic acid or a salt thereof, (c) 0.0001 to 0.1 wt % of a strontium compound and (d) 0.01 to 0.5 wt % of at least one selected from among polymers or copolymers of unsaturated monoethylene dicarboxylic acids having four to six carbon atoms or salts thereof, polymers or copolymers of unsaturated monoethylene monocarboxylic acids having four to six carbon atoms or salts thereof and copolymers of the above unsaturated monoethylene dicarboxylic acid having four to six carbon atoms or a salt thereof and the above unsaturated monoethylene monocarboxylic acid having four to six carbon atoms or a salt thereof. The cooling fluid composition exhibits excellent capability for the prevention of corrosion of aluminum or an aluminum alloy, a cast iron, steel and the like, and also is excellent in the stability to a hard water even in the presence of a phosphate.</p> |
