CAJ | 학술논문

用失重法和动电位极化曲线研究了紫茎泽兰(Eupatorium adenophora Spreng.)叶提取物(EASLE)在1.0mol/L HCl溶液中对冷轧钢的缓蚀行为.结果表明:EASLE在HCl溶液中对钢具有良好的缓蚀作用,缓蚀率随缓蚀剂浓度的增加而增大,但随温度的升高而降低.EASLE在钢表面的吸附符合Langmuir吸附等温式,得出了吸附热力学参数(吸附焓ΔH0,吸附Gibbs自由能ΔG0,吸附熵ΔS0),并据此探讨了EASLE的吸附行为.动电位极化曲线表明,EASLE为混合抑制型缓蚀剂.
용실중법화동전위겁화곡선연구료자경택란(Eupatorium adenophora Spreng.)협제취물(EASLE)재1.0mol/L HCl용액중대랭알강적완식행위.결과표명:EASLE재HCl용액중대강구유량호적완식작용,완식솔수완식제농도적증가이증대,단수온도적승고이강저.EASLE재강표면적흡부부합Langmuir흡부등온식,득출료흡부열역학삼수(흡부함ΔH0,흡부Gibbs자유능ΔG0,흡부적ΔS0),병거차탐토료EASLE적흡부행위.동전위겁화곡선표명,EASLE위혼합억제형완식제.
The inhibition effect of Eupatorium adenophora Spreng. Leaves extract (EASLE) on the corrosion of cold rolled steel in 1.0 mol/L HCl solution was studied by weight loss and potentiodynamic polarization curves methods.The results show that EASLE is a good inhibitor for cold rolled steel in 1.0 mol/L HCl solution, and inhibition efficiency increases with the concentration of inhibitor, while decreases with the temperature. The adsorption of EASLE on steel surface obeys Langmuir adsorption isotherm. The adsorption thermodynamic parameters (adsorption free energyΔG0, adsorption enthalpyΔH0, adsorption entropyΔS0) are also calculated. Based on these parameters, the adsorption behavior is discussed. Potentiodynamic polarization curves show that EASLE acts as a mixed-type inhibitor.