HCl溶液中氨基酸复合缓蚀剂对碳钢的缓蚀作用

采用失重法和电化学方法,研究了半胱氨酸、蛋氨酸对盐酸介质中碳钢的缓蚀作用.失重实验结果表明:半胱氨酸、蛋氨酸的用量为800 mg/L时,对碳钢的缓蚀率仅分别为66.61％和62.44％.与蛋氨酸相比,半胱氨酸与环烷基咪唑啉季铵盐有较好的协同作用,组分质量比为1∶1,总用量为1 600 mg/L,缓蚀率达到91.050％...

Inhibition Performances of Compound of Amino Acid Inhibitors for Carbon Steel in HCl Solution

Inhibition performances of two amino acids,namely cysteine and methionine,as corrosion-safe inhibitors for carbon steel in hydrochloric acid were investigated by weight loss and electrochemistry methods.The restul shows that the inhibition efficiency of cysteine or methionine is 66.61% and 62.44% with concentration of 800 mg/L respectively.Compared to the amino acid,the synergistic effect between cysteine and naphthene base imidazoline quaternary ammonium salt is good.The component mass ration is 1∶1.The main use concentration is 1 600 mg/L.The inhibition efficiency reaches 91.05%.The inhibition efficiency reaches 95.98% for the composite inhibitors with 20 mg/L cysteine,50 mg/L naphthene base imidazoline quaternary ammonium salt and 50 mg/L HMTA.Results obtained from potentio-dynamic polarization and impedance measurements are in good agreement.Results indicate that these inhibitors act as mixed-type inhibitors.