Electrochemical measurements and theoretical calculations on the inhibitive interaction of Plectranthus amboinicus leaf extract with mild steel in hydrochloric acid

被引：51
作者：
Anupama, K. K. [1 ]
Ramya, K. [1 ]
Joseph, Abraham [1 ]
机构：
[1] Univ Calicut, Dept Chem, Calicut Univ PO, Calicut, Kerala, India
来源：
MEASUREMENT | 2017年 / 95卷
关键词：
Acid solutions; EIS; Acid corrosion; Acid inhibition; Polarization; CORROSION INHIBITION; CARBON-STEEL; HCL; ADSORPTION; IMPEDANCE; SURFACE; OIL; LEAVES; IRON;
D O I：
10.1016/j.measurement.2016.10.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion inhibition property of Plectranthus amboinicus leaves extracts for mild steel in HCl has been studied using EIS and potentiodynamic polarization techniques. Two main constituents of the leaf thymol and 1,8-cineole were also monitored for their inhibition behaviour, both in the individual form and in combination with each other. EIS studies revealed that the dried and fresh leaf extracts of PA (PADE and PAFE) show fairly good inhibition efficiencies. (upto 98% for PADE and 93% for PAFE) in the studied system. Potentiodynamic polarization studies revealed the mixed type inhibition behaviour of the extracts. The synergism studies and theoretical calculations done using Gaussian 03 program revealed that the combination of thymol and cineole exhibited enhanced inhibition efficiency compared to the individual forms. The weight loss measurements also revealed the inhibition potential of the extracts. The mode of adsorption of the extracts was found obeying Langmuir isotherm. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：297 / 305
页数：9
相关论文
共 46 条
[1]   Effect of Avogadro natural oil on the corrosion inhibition of mild steel in hydrochloric acid solution [J].
Abdulwahab, M. ;
Fayomi, O. S. I. ;
Popoola, A. P. I. ;
Asuke, F. ;
Umoru, L. E. .
RESEARCH ON CHEMICAL INTERMEDIATES, 2014, 40 (03) :1115-1123
[2]   Experimental and quantum chemical characterization of the adsorption of some Schiff base compounds of phthaloyl thiocarbohydrazide on the mild steel in acid solutions [J].
Ahamad, I. ;
Prasad, R. ;
Quraishi, M. A. .
MATERIALS CHEMISTRY AND PHYSICS, 2010, 124 (2-3) :1155-1165
[3]   Quantum chemical studies on the corrosion inhibition of some sulphonamides on mild steel in acidic medium [J].
Arslan, Taner ;
Kandemirli, Fatma ;
Ebenso, Eno E. ;
Love, Ian ;
Alemu, Hailemichael .
CORROSION SCIENCE, 2009, 51 (01) :35-47
[4]   Investigation of some Schiff base compounds containing disulfide bond as HCl corrosion inhibitors for mild steel [J].
Behpour, M. ;
Ghoreishi, S. M. ;
Mohammadi, N. ;
Soltani, N. ;
Salavati-Niasari, M. .
CORROSION SCIENCE, 2010, 52 (12) :4046-4057
[5]   Corrosion control of mild steel using 3,5-bis(4-methoxyphenyl)-4-amino-1,2,4-triazole in normal hydrochloric acid medium [J].
Bentiss, Fouad ;
Jama, Charafeddine ;
Mernari, Bouchaib ;
El Attari, Hassan ;
El Kadi, Lamia ;
Lebrini, Mounim ;
Traisnel, Michel ;
Lagrenee, Michel .
CORROSION SCIENCE, 2009, 51 (08) :1628-1635
[6]  
BIDOIA ED, 1994, ELECTROCHIM ACTA, V39, P763, DOI 10.1016/0013-4686(94)80021-9
[7]   THE COMPOSITION OF THE ESSENTIAL OIL IN THE LEAVES OF COLEUS-AROMATICUS BENTHAM AND THEIR IMPORTANCE AS A COMPONENT OF THE SPECIES ANTIAPHTHOSAE PH-NED-ED-V [J].
BOS, R ;
HENDRIKS, H ;
VANOS, FHL .
PHARMACEUTISCH WEEKBLAD-SCIENTIFIC EDITION, 1983, 5 (04) :129-130
[8]  
Cang H, 2013, INT J ELECTROCHEM SC, V8, P720
[9]  
Chetouani A, 2003, B ELECTROCHEM, V19, P23
[10]  
De Levie R., 1965, Electrochimica Acta, V10, P395
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