Corrosion inhibition of mild steel in 1 M HCl solution by henna extract: A comparative study of the inhibition by henna and its constituents (Lawsone, Gallic acid, α-D-Glucose and Tannic acid)

被引：578
作者：
Ostovari, A. [1 ]
Hoseinieh, S. M. [1 ]
Peikari, M. [1 ]
Shadizadeh, S. R. [2 ]
Hashemi, S. J. [1 ]
机构：
[1] Petr Univ Technol, Tech Inspect Engn Dept, Abadan, Iran
[2] Petr Univ Technol, Dept Petr Engn, Abadan, Iran
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 09期
关键词：
Acid solutions; EIS; SEM; Acid inhibition; Pitting corrosion; CARBON-STEEL; HYDROCHLORIC-ACID; THERMODYNAMIC CHARACTERIZATION; ELECTROCHEMICAL-BEHAVIOR; ADSORPTION PROCESSES; METAL DISSOLUTION; NATURAL HONEY; ALUMINUM; ALLOYS; MEDIA;
D O I：
10.1016/j.corsci.2009.05.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The inhibitive action of henna extract (Lawsonia inermis) and its main constituents (lawsone, gallic acid, alpha-D-Glucose and tannic acid) on corrosion of mild steel in 1 M HCl solution was investigated through electrochemical techniques and surface analysis (SEM/EDS). Polarization measurements indicate that all the examined compounds act as a mixed inhibitor and inhibition efficiency increases with inhibitor concentration. Maximum inhibition efficiency (92.06%) is obtained at 1.2 g/l henna extract. Inhibition efficiency increases in the order: lawsone > henna extract > gallic acid > alpha-D-Glucose > tannic acid. Also, inhibition mechanism and thermodynamic parameters are discussed. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1935 / 1949
页数：15
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