采用失重法研究了复配葡萄糖酸钠、苯甲酸钠与硫酸锌、硝酸镧可溶性盐在pH值为6.5的3.5% NaCl溶液中对Z30铸铁片的缓蚀效应. 结果表明当葡萄糖酸钠、苯甲酸钠的浓度均为250 mg/L, Zn2+浓度分别为2 mmol/L与3 mmol/L时, 缓蚀率高达92.5%与95.3%, 而加入La3+浓度为0.5 mmol/L时, 缓蚀率可达86.7%.
The synergistic inhibition effect of sodium gluconate and sodium benzoate with Zn2+and La3+ respectively on cast iron Z30 in 3.5% NaCl solution was studied by means of mass loss method. The results showed that the complex of sodium gluconate and sodium benzoate with additives of Zn2+ and La3+exhibited good synergistic inhibition effect and the inhibition efficiencies reach 92.5%and 95.3% when the concentration of sodium gluconate and sodium benzoate both was 250 mg/L, while the concentrations of Zn2+ were 2 mmol/L and 3 mmol/L, respectively. On the other hand, an inhibition efficiency of 86.7% was achieved for the complex with 0.5 mmol/L La3+.
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