盐酸介质中双子表面活性剂对N80钢的吸附缓蚀性能

Corrosion Inhibiton of N80 Steel in HCl Acid Medium by Gemini Surfactant

采用静态失重法、电化学方法和扫描电镜等方法,研究了一种双子表面活性剂(DBA2-12)对N80钢在盐酸介质中的吸附缓蚀性能。结果表明,DBA2-12对N80钢在1 mol/L的盐酸溶液中具有较好的缓蚀性能。随着缓蚀剂浓度的增加,缓蚀率增大;随着实验温度升高,缓蚀率减小。该缓蚀剂在N80钢表面的吸附遵循Langmuir吸附等温式,是一种混合抑制型缓蚀剂。

The corrosion inhibition of Gemini surfactant （DBA2.,2） for N80 steel in 1 mol/L HC1 was investigated using mass loss methods, electrochemical methods and scanning electron micro scopic methods. It was found that DBA2_12 exhibited good corrosion inhibition performance. Mass loss method reveals that the inhibition efficiency increases with the increase in concentration of DBA：. 12, while decreases with the increase in temperature of acid medium. The adsorption of DBA21： on the metal surface has been found to obey Langmuir isotherm. Potentiodynamic polariza tion studies clearly suggest that DBA2： acts as mixedtype inhibitor, which can be adsorbed on NS0 steel surface, leading to the formation of a protective film to decrease the corrosion rate.