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研究了薄层液膜下空间电场对碳酸环己胺(CHC)缓蚀性能的影响。结果表明,CHC主要抑制碳钢腐蚀反应的阳极过程,对碳钢腐蚀具有显著的缓蚀效果,但施加垂直方向的电场后CHC缓蚀效果显著下降。扫描电镜和X射线光电子能谱分析表明,电场作用导致碳钢表面的腐蚀形貌出现明显变化,CHC在碳钢表面的吸附量显著减少。CHC分子的偶极距(μ)、最高占据轨道能(E_(HOMO))、最低空余轨道能(E_(LUMO))以及能隙(?E=E_(LUMO)-E_(HOMO))在不同的电场条件下的变化规律表明,电场会削弱CHC的反应活性和吸附能力,从而降低其缓蚀效率。
The effect of electric field under thin film liquid membrane on the corrosion inhibition of cyclohexylamine (CHC) was studied. The results show that CHC mainly inhibits the anodic process of corrosion reaction of carbon steel, and has a significant corrosion inhibition effect on the corrosion of carbon steel. However, the effect of CHC corrosion inhibition decreases remarkably after applying the vertical electric field. Scanning electron microscopy and X-ray photoelectron spectroscopy analysis showed that the corrosion morphology of the carbon steel surface changed obviously due to the electric field, and the amount of CHC adsorbed on the surface of the carbon steel decreased remarkably. CHC molecules have different dipole (μ), highest occupied orbital energy (E HOMO), lowest residual orbital energy (E LUMO) and energy gap (H EO EO) The results show that the electric field will weaken the reactivity and adsorption ability of CHC and thus reduce its corrosion inhibition efficiency.