Open AccessINVESTIGATION OF THE INHIBITIVE PROPERTIES OF MANGIFERA INDICA (MANGO) SEED EXTRACT ON TIN METAL CORROSION IN ACID MEDIUM
Author(s) -
I C Ekeke,
E.C. Osoka,
S A Maduabuchi,
S O Anyikwa,
Ahizi A. E
Publication year - 2021
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2021.v05i10.002
Subject(s) - mangifera , adsorption , freundlich equation , physisorption , chemistry , metal , tin , gravimetric analysis , nuclear chemistry , corrosion , langmuir adsorption model , langmuir , chromatography , botany , organic chemistry , biology
The ability of Mangifera indica seed extract toinhibit the corrosion of tin metal immersed in 0.5M HClacid using the gravimetric method, in the form of aprolonged test and a rapid test at room temperature wasstudied. The prolonged test was carried out over a periodof 21 days at two (2) days intervals, while the rapid testwas performed for 5hours at intervals of 1hour. Theexperiments were performed with inhibitor concentrationsof 0.2g/l, 0.4g/l, 0.6g/l, 0.8g/l and 1.0g/l. Results showedthat, for the prolonged test, a maximum inhibitionefficiency of 97.4944% at 1.0g/l concentration wasobtained and the adsorption of the extract on the metalobeyed the Langmuir adsorption isotherm, whereas for therapid test, a maximum inhibition efficiency of 84.2294%was obtained and the adsorption of the extract on themetal followed the Freundlich adsorption isotherm. Both isotherms confirm the mechanism of physisorption.