Author:
Ezugha Stephen Ifeanyi,Aralu Chiedozie Chukwuemeka
Abstract
AbstractCorrosion of mild steel (MS) in industries has become a menace that has led to the use of organic green inhibitors from plant origin, which is seen as a cheap, eco-friendly substitute for inorganic inhibitors. This work employed Solanum macrocarpon (SM) methanol leaf extract as a green inhibitor using a gravimetric method at 303–323 K, respectively. The phytochemical screening was done using standard methods to identify the phytochemical compounds in the leave extract. The Fourier transform infrared (FTIR) analysis was also done to elucidate the functional groups that contain heteroatoms responsible for the inhibition efficiency. The effectiveness of the inhibition efficiency increased with concentration and decreased with rising temperature. The results demonstrated that Solanum macrocarpon leaf methanol extract is an effective mild steel corrosion inhibitor in 0.5 M H2SO4. 95% optimum inhibition efficiency (I.E) was observed at 0.5% w/v concentration for 303 K. The inhibition potential was attributed to the phytochemical compounds in the leaf extract, which contain polar functional groups and hetero-atoms in their structures. The $${E}_{a}$$
E
a
and $$\Delta {G}_{ads}$$
Δ
G
ads
showed that the adsorption mechanism followed physisorption. The results showed the potential use of SM methanol extract as a corrosion inhibitor in mild steel, which can decrease corrosion in industries.
Publisher
Springer Science and Business Media LLC
Subject
General Earth and Planetary Sciences,General Physics and Astronomy,General Engineering,General Environmental Science,General Materials Science,General Chemical Engineering
Reference40 articles.
1. Umoren SA, Gasem ZM, Obot IB (2013) Natural products for materials protection: inhibition of mild steel corrosion by date palm seed extracts in acid media. Ind Eng Chem Res 52:14855–65
2. Kesavan D, Gopiraman M, Sulochana N (2012) Green inhibitors for corrosion of metals: a review. Chem Sci Review Lett 1(1):1–8
3. Rajeev P, Surendranathan AO, Murthy CSN (2012) Corrosion mitigation of the oil well steels using organic inhibitors—a review. J Mater Environ Sci 3(5):856–869
4. Loto RT, Loto CA, Popoola AP (2015) Inhibition effect of phenylamine on the corrosion of austenitic stainless steel type 304 in dilute sulphuric acid. Canad J Pure Appl Sci 9(2):3409–3422
5. Durodola SS, Adekunle AS, Olasunkanmi LO et al (2020) Inhibition of mild steel corrosion in acidic medium by extract of Spilanthes uliginosa leaves. Electroanalysis 32:2693–2702