Corrosion Mitigation by an Eco-Friendly Inhibitor: Nerium Oleander Leaf Extract on Carbon Steel in an Acidic Medium

被引：1

作者：

Selvi, J. Arockia ^{[1
]}

Arthanareeswari, M. ^{[1
]}

Kamaraj, P. ^{[2
]}

Malini, T. Pushpa ^{[1
]}

Elumalai, V ^{[3
]}

Revathi, S. ^{[1
]}

Subasree, N. ^{[1
]}

机构：

[1] SRM Inst Sci & Technol, Dept Chem, Kattankulathur 603203, India

[2] Vel Tech Rangarajan Dr Sanguthala R&D Inst Sci &, Dept Chem, Avad I 600002, India

[3] Univ Pittsburgh, Chevron Sci Ctr, Dept Chem, POB 15260, Pittsburgh, PA 15260 USA

来源：

PORTUGALIAE ELECTROCHIMICA ACTA | 2020年 / 38卷 / 06期

关键词：

carbon steel; corrosion inhibition; Nerium oleander leaf extract; electrochemical techniques; MILD-STEEL; TEMPERATURE;

D O I：

10.4152/pea.202006387

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：387 / 400

页数：14

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