CORROSION INHIBITIVE PROPERTIES OF EXTRACT OF JATROPHA CURCAS LEAVES ON MILD STEEL IN HYDROCHLORIC ACID ENVIRONMENT

被引：2

作者：

Odusote, J. K. ^{[1
]}

Ajayi, O. M. ^{[2
]}

机构：

[1] Univ Ilorin, Dept Mat & Met Engn, Ilorin, Nigeria

[2] Univ Ilorin, Dept Mech Engn, Ilorin, Nigeria

来源：

IRANIAN JOURNAL OF MATERIALS SCIENCE AND ENGINEERING | 2016年 / 13卷 / 03期

关键词：

Mild Steel; Green Inhibitor; Corrosion; Weight Loss; Thermometric; Adsorption Isotherms;

D O I：

10.22068/ijmse.13.3.1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Jatropha curcas leaves extract was tested as a green corrosion inhibitor for mild steel in aqueous hydrochloric acid solution using gravimetric and thermometric techniques. The results reveal that the inhibition efficiency vary with concentration of the leaf extract and the time of immersion. Maximum inhibition efficiency was found to he 95.92% in 2M HCl with 0.5 g/l concentration of the extract in gravimetric method, while 87.04% was obtained in thermometric method. The inhibiting effect was attributed to the presence of alkaloids, flavonoids, saponins, tannins and phenol in the extract. The adsorption processes of the Jatropha curcas leaves extract onto the mild steel is consistent with the assumptions of Langmuir isotherm model and also found to he spontaneous. From the results, a physical adsorption mechanism is proposed for the adsorption of Jatropha curcas leaves extract onto mild steel surface.

引用

页码：1 / 11

页数：11

共 46 条

[1] Gossipium hirsutum L. extracts as green corrosion inhibitor for aluminum in NaOH solution [J].