| 摘要 |
PURPOSE:To obtain an anticorrosive having superior performance on a metal brought into contact with an aq. soln. of salts by dissolving lignins and ascorbic acids in water in a specified ratio. CONSTITUTION:An aq. soln contg. 200-4,000mg/l in total of lignins such as lignin, ligninsulfonic acid, alkali metal salts and alkaline earth metal salts thereof and ascorbic acids such as L-ascorbic acid, erythorbic acid, alkali metal salts and alkaline earth metal salts thereof in 4:1-1:4 ratio is used as an anticorrosive for a metal member such as an Fe, Cu or Cu alloy member brought into contact with an aq. soln. contg. 1-35wt.% alkali metal salts and alkaline earth metal salts such as CaCl2, MgCl2 and NaCl. By the synergistic effect of the lignins and ascorbic acids, the anticorrosive produces a significant corrosion preventing effect on the metal brought into contact with the aq. soln. of salts. |
