希硫酸による鉄の酸食の抑制剤について
1967 年 16 巻 11 号 p. 623-625
詳細
1967 年 16 巻 11 号 p. 623-625
Effect of the surfactants for corrosion of iron powder by acid was studied. Amounts of undissolved residue of iron powder in dil. aqueous sulfuric acid solution in the presence of the surfactants at every five minutes were measured. The results were as follows.
1) Sodium dilauryldithiophosphate, laurylpyridinium chloride and thiourea etc. retarded considerably the rate of dissolution of iron. Rise in the reaction temperature from 36 to 65°C decreased repressionabilities by the surfactants at considerable rate, except sodium dilauryldithiophosphate.
2) In order to make clear co-operation of surfactants, combinations between the main component such as Disol-S, stearic acid, dilauryldithiophosphate and the subcomponent of other surfactants were tested. Among the above combinations of surfactants, the best result was obtained by the cooperative use of sodium dilauryldithiophosphates and sodium dodecylbenzenesulfonate which revealed a synergism at 30-50°C.
