| 摘要 |
PURPOSE:To improve anticorrosive and scale inhibition effects of metals in an aq. system by making 1-hydroxyethylidene-1, 1-diphosphonic acid, specified phosphonocarboxylic acid and a water soluble zinc compd. an effective component. CONSTITUTION:An anticorrosive is constituted by making 1-hydroxyethylidene-1, 1-disphosphonic acid (water soluble salt) (a), phosphonocarboxylic acid (water soluble salt) (b) shown in a general formula and a water soluble zinc component. The proportion of each component is regulated to about 20-60wt% (a), about 20-60wt% (b) and about 10-30wt% expressed in terms of zinc. The corrosion inhibitor is introduced continuously or intermittently in an aqueous system so that the addition quantity of the anticorrosive is regulated to the concn. of about 0.2-20ppm (a) component, about 0.2-20ppm (b) component and about 0.2-30ppm (c) component. The problem of scale accumulation is solved by this anticorrosive and also excellent corrosion inhibition effect for metal is obtained. |
