Bøker av Neha Parekh

There is a growing trend to utilize plant extracts compounds as corrosion inhibitor. Corrosion Inhibition of Mild Steel in 2M Hydrochloric acid (HCl) by leaves extract of Hibiscus rosa sinensis has been studied using weight loss measurement and spectrophotometry technique at 35oC. Characterization of Hibiscus rosa sinensis leaves extract was carried out using GC-MS technique. Results confirmed that the leaves extract of Hibiscus rosa sinensis inhibited the acid induced corrosion of Mild Steel (MS). The inhibition efficiency increases with increases in concentration of the extract. Inhibitive effect was afforded by adsorption of the extracts¿ components which was approximated by Freundlich adsorption isotherm, Langmuir adsorption isotherm and Temkin adsorption isotherm.

Green corrosion inhibitors are rich source of necessary elements such as O, C, N and S, which are active in organic compounds. These assist in adsorption of these compounds on metals or alloys to form a film that protects the surface and resists corrosion. Henceforth, protective films are formed on the metal surface and hence corrosion is prevented. Apart from being inexpensive and readily available plant products are non-toxic and biodegradable. The present research focuses on the extracts of Asopalav leaves (Polyalthia longifolia) and dried Marigold petals (Tagetes) as green corrosion inhibitors for pure Al in acidic medium using weight loss methods. Inhibition efficiency was further enhanced in presence of metal nanoparticles. It also varies directly with temperature and hence, preferred for reactions at higher temperatures.