咪唑啉酰胺在含 CO_2 溶液中的缓蚀机理

Inhibition Mechanism of Imidazoline Amide in CO2 Solution

用电化学阻抗谱及极化测量，研究了在含ＣＯ２的ＮａＣｌ溶液中咪唑啉酰胺（ＩＭ）对铁的缓蚀性能研究，并探讨了它在铁表面的吸脱附行为．结果表明，ＩＭ的缓蚀作用是由它对铁的负催化所控制．它在铁表面的吸附服从Ｌａｎｇｍｕｉｒ吸附等温式．电位正移到脱附电位以上是ＩＭ阳极脱附的主要原因，这时它使表面电容Ｃｄ显著增加。

The inhibition mechanism of imidazoline amide(IM) in CO2 solution has been studied by electrochemical techniques including electrochemical impedance spectrum and polarization result measurements. It is shown that the inhibition of IM is due to the negative catalytic effect on the iron. Its adsorption obeyed the Langmuir isotherm. The positive shift over to adsorption potential is the main reason of desorption of IM on the anode, which increases the interface capacity and decreases the transmission resistance.