THE STUDY OF HENNA LEAVES EXTRACT AS GREEN CORROSION INHIBITOR FOR MILD STEEL IN ACETIC ACID

被引:12
作者
Chaudhari, H. G. [1 ]
Vashi, R. T. [1 ]
机构
[1] Navyug Sci Coll, Dept Chem, Surat, India
关键词
corrosion; mild steel; acetic acid; henna leaves extract; green inhibitor;
D O I
10.4314/jfas.v8i2.8
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The inhibitive action of henna (Lawsonia Inermis) leaves on mild steel in acetic acid solution have been investigated by weight-loss, A C impedance and potentiodynamic polarization measurements. The study indicates that as acid concentration increases corrosion rate increases. The corrosion inhibition efficiency increases with increase in concentration of extract. The result obtained revealed that henna leaves extract act as an efficient inhibitor. The adsorption of the henna leaves extract obeyed Langmuir adsorption isotherm. The calculated thermodynamic parameters indicated that the adsorption was a spontaneous, exothermic process accompanied by an increase in entropy. Cathodic and anodic polarization curves show that henna leaves extract is a mixed-type inhibitor.
引用
收藏
页码:280 / 296
页数:17
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