CORROSION INHIBITIVE PROPERTIES OF EXTRACT OF JATROPHA CURCAS LEAVES ON MILD STEEL IN HYDROCHLORIC ACID ENVIRONMENT
عنوان مقاله: CORROSION INHIBITIVE PROPERTIES OF EXTRACT OF JATROPHA CURCAS LEAVES ON MILD STEEL IN HYDROCHLORIC ACID ENVIRONMENT
شناسه ملی مقاله: JR_IJMSEI-13-3_001
منتشر شده در در سال 1395
شناسه ملی مقاله: JR_IJMSEI-13-3_001
منتشر شده در در سال 1395
مشخصات نویسندگان مقاله:
J. Odusote - University of Ilorin, Ilorin, Nigeria
O. Ajayi - University of Ilorin, Ilorin, Nigeria
خلاصه مقاله:
J. Odusote - University of Ilorin, Ilorin, Nigeria
O. Ajayi - University of Ilorin, Ilorin, Nigeria
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 be ۹۵.۹۲% in ۲M HCl with ۰.۵ g/l concentration of the extract in gravimetric method, while ۸۷.۰۴% 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 be spontaneous. From the results, a physical adsorption mechanism is proposed for the adsorption of Jatropha curcas leaves extract onto mild steel surface.
کلمات کلیدی: Mild steel, green inhibitor, corrosion, weight loss, thermometric, adsorption isotherms
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1723123/