Open AccessINVESTIGATION OF THE INHIBITIVE PROPERTIES OF MANGIFERA INDICA (MANGO) SEED EXTRACT ON ALUMINUM METAL CORROSION IN 0.5M HCL MEDIUM
Author(s) -
I C Ekeke,
S O Olubiyi,
E E Obasi,
C Nzeoma,
S O Anyikwa,
Uzoma H. C,
B C Ngolube
Publication year - 2020
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2020.v05i04.081
Subject(s) - mangifera , corrosion , aluminium , metal , chemistry , nuclear chemistry , metallurgy , materials science , horticulture , botany , biology
.Mangifera indica (Mango) seed extract was examined as corrosion inhibitor for aluminum in hydrochloric acid medium. The inhibition properties of the extract were investigated using gravimetric method in the form of a prolonged period of experimentation (21 days) and a rapid period of experimentation (5 hours). Inhibitor concentration (0.2 g/L – 1.0 g/L) and time were the considered factors at ambient temperature. In the case of the prolonged test, variation of weight loss was monitored periodically in 0.5M HCl medium in the presence of the different concentrations of the inhibitor and its absence. The weight loss was calculated in grams as the difference between the initial weight and the weight after the removal of the corrosion product. In the rapid test case, air was introduced in the acidic medium and weight loss measurements also taken after the experiment. The concentration of extract with the highest inhibition efficiency for the prolonged test experiment was 0.4g/L, with an efficiency of 95.31% recorded while the highest inhibition efficiency value for the rapid test case was 93.68% recorded for the 1.0g/L concentration. However, most of the efficiency values obtained in the former were low compared with those obtained in the latter. This shows that Mangifera indica seed extract better inhibited the corrosion of aluminum in hydrochloric acid during the