A descriptive study for corrosion control of low-alloy steel by Aloe vera extract in acidic medium

被引：19
作者：
Dahiya, Shefali [1 ]
Lata, Suman [1 ]
Kumar, Parmod [1 ]
Kumar, Rajeev [1 ]
机构：
[1] Deenbandhu Chhotu Ram Univ Sci & Technol, Sonipat 131001, Haryana, India
来源：
CORROSION REVIEWS | 2016年 / 34卷 / 04期
关键词：
adsorption; Aloe vera; corrosion; inhibition; MILD-STEEL; LEAVES EXTRACT; INHIBITION;
D O I：
10.1515/corrrev-2016-0015
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Methanol extract of Aloe vera leaves (AE) as a green inhibitor for controlling corrosion of low-alloy steel (mild steel) in 0.5 m HCl solution was studied using gravimetric analysis, potentiostatic polarization measurements, electrochemical impedance spectroscopy and quantum analysis. The results obtained revealed that AE has fairly good inhibiting properties against corrosion of mild steel in 0.5 m HCl solution, with efficiency >97%. Also, the inhibition was mixed type that follows the Langmuir adsorption isotherm. The value of Delta G reveals that AE inhibits the corrosion rate via physical type adsorption on the mild steel surface which is further supported by Dubinin-Radushkevich isotherm.
引用
收藏
页码：241 / 248
页数：8
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