噻唑衍生物在酸性介质中对A_3钢的缓蚀性能

Inhibition Corrosion of Thiazole Derivatives on A_3 Steel in 1 mol/L HCl Solution

采用失重法和电化学方法研究了2-氨基(1-苯基-3-氧代丁基)-5-甲基-噻唑(ABT)和2-氨基(1,4-二苯基-3-氧代丁基)-5-甲基-噻唑(ADT)在1 mol/L HC l溶液中对A3钢的缓蚀性能和吸附行为。结果表明,在1 mol/L HC l溶液中2种化合物对A3钢均有较好的缓蚀性能,其最佳浓度均为400 mg/L,并且ADT的缓蚀性能比ABT的缓蚀性能好。2种化合物在A3钢表面上的吸附过程为放热过程,其在A3钢表面上的吸附行为服从Langmu ir吸附等温式,A3钢对ABT、ADT的吸附主要属于物理吸附。

The inhibition corrosion behavior of 2-amido（ 1-phenyl-3-butyl）-5-methyl-thiadiazole and 2-amido （ 1,4-diphenyl-3-butyl） -5-methyl-thiadiazole on A3 steel in 1 mol/L HCl solution was investigated by means of mass loss and AC impedance. It has been shown that the two inhibitors have good inhibition performance for A3 steel in 1 mol/L HCl solution with optimal concentration of 400 mg/L. And inhibition efficiency of 2-amido （1,4-diphenyl-3-butyl）-5-methyl-thiadiazole is better than that of 2-amido（1-phenyl-3-butyl）-5-methyl-thiadiazole. The adsorption processes are exothermic reactions and belongs to the physical adsorptions and the Langmuir isotherm is followed.