期刊
PORTUGALIAE ELECTROCHIMICA ACTA
卷 38, 期 6, 页码 387-400出版社
SOCIEDADE PORTUGUESA ELECTROQUIMICA
DOI: 10.4152/pea.202006387
关键词
carbon steel; corrosion inhibition; Nerium oleander leaf extract; electrochemical techniques
The inhibitory activity of ethanol extract of Nerium oleander leaf (NOLE) on carbon steel corrosion in 0.5 M and 1.0 M of hydrochloric acid solutions was studied by weight loss method and electrochemical techniques. The inhibition efficiency (eta(w)) increased with an increase in the concentration of NOLE and in temperature. Polarisation curves indicated that NOLE acts as a mixed type of inhibitor. The changes in charge transfer resistance (R-t) with increasing inhibitor (i.e. NOLE) concentration assured the adsorption of the inhibitor onto the metal surface. The results of eta(w), eta(p) (inhibition efficiency obtained from polarisation study) and eta(R) (inhibition efficiency obtained from impedance analysis) are in par with each other. Surface morphology study uncovered the coating of the inhibitor molecule on the metal surface. The phenomenon of physical adsorption has been established based on the inhibition efficiency of the inhibitor with change in temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据