Sweet Clover Leaves as Green Inhibitor in Petroleum Medium

R. Majed, M. Alzuhairi, H. Abdullah
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引用次数: 3

Abstract

. This work involves the study of the corrosion inhibition of steel in petroleum medium using alcoholic extracted of Sweet Clover leaves SC with four concentrations of extracted (1, 3, 5 and 7mL/L) at four temperatures over the range 50 – 80 o C. Inhibition efficiency IE% results show that 3 mL/L the best concentration which they gave efficiencies in the range of 73.2–83.9%. Thermodynamic functions of adsorption processes were calculated from experimental polarization data and the interpretation of the results reveals that Ficus carica extract SC extract obey Langmuir adsorption isotherm. Polarization curves indicate that SC extract is a mixed type inhibitor. The small values of K ads refer to physical adsorption process. The values of Δ G oads , Δ H oads and Δ S oads were negative indicating the spontaneous and exothermic adsorption process as well as SC extract retained the metal ions and reducing the dissolution of steel and the activated complex in the rate determining step denotes an association rather than a dissociation step.
甜三叶草叶在石油介质中的绿色抑制剂作用
. 在50 ~ 80℃范围内,用4种浓度(1、3、5、7mL/L)的甜三叶草叶醇提物在石油介质中对钢的缓蚀作用进行了研究,缓蚀效率为IE%,结果表明,3 mL/L的醇提物的缓蚀效率为73.2% ~ 83.9%。根据实验极化数据计算了吸附过程的热力学函数,结果表明无花果提取物SC提取物服从Langmuir吸附等温线。极化曲线表明,SC提取物为混合型缓蚀剂。K ads的小值是指物理吸附过程。Δ G负载、Δ H负载和Δ S负载的值为负,表明自发和放热吸附过程,以及SC提取物保留了金属离子,减少了钢和活化配合物的溶解,在速率决定步骤中表明是结合而不是解离步骤。
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