Inhibitive action of Vernonia amygdalina on the corrosion of aluminium alloys in acidic media

被引：107

作者：

Avwiri, GO ^{[1
]}

Igho, FO ^{[1
]}

机构：

[1] Univ Port Harcourt, Dept Phys, Port Harcourt, Nigeria

来源：

MATERIALS LETTERS | 2003年 / 57卷 / 22-23期

关键词：

corrosion; inhibition; Vernonia amygdalina; aluminium alloys;

D O I：

10.1016/S0167-577X(03)00167-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The action of Vernonia amygdalina (bitter leaf) on the acidic corrosion of 2S and 3RS alloys aluminium was studied using the weight loss method. The corrosion rates and inhibition efficiencies of the various aluminium coupons in the extract were calculated. The average corrosion rates of 6.5 x 10(-3) and 5.5 x 10(-3) mpy were obtained for 2S and 3SR alloys, respectively, in 0.1 M HNO3 while 18.2 x 10(-3) and 10.4 x 10(-3) mpy Were calculated for the 2S and 3SR alloys in 0.1 M hydrochloric acid (HCl), respectively. The results further showed the highest inhibition efficiency of 49.5% for the 0.1 M HCl and 72.5% for 0.1 M HNO3, respectively. However, the 0.2g/l concentration showed a better performance in the inhibition of 0.1 M HCl for all samples. (C) 2003 Published by Elsevier Science B.V.

引用

页码：3705 / 3711

页数：7