Relationship between the inhibition and antioxidant properties of the plant and biomass wastes extracts – A Review

• V.I. Vorobyova¹, M.I. Skiba², A.S. Shakun¹ and S.V. Nahirniak¹

¹ National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine. Ave Peremogy 37, Kiev, 03056, Ukraine
² Ukrainian State Chemical-Engineering University, Gagarin Ave. 8, Dnipro, 49005, Ukraine

Abstract: Corrosion inhibitors are the only most widely applied method for corrosion protection of metallic materials and are of particular importance in industry. Nowadays, the synthesis of corrosion inhibitors using traditional multistep reactions is highly restricted because of the increasing demands of “green chemistry”. Plant materials and biomass wastes are ideal green candidatures to replace traditional toxic corrosion inhibitors. Literature survey reveals that different extracts of the plant and agro-food wastes contain naturally phytochemical compounds which have antioxidant properties have been effectively employing as sustainable inhibitors for the corrosion of different metals and alloys. Nevertheless, despite the numerous research papers, the reviews in which the correlation between the antioxidant/free radical scavenging activity of the extracts and their inhibition action is explained are not represented in the literature. This paper provides a brief overview of current knowledge in what kind of methods are used to estimate the antioxidant content, which classes of compounds provide higher antiradical activity and poses questions that we need to answer in order to use parameter of the antioxidant activity as a predictive index for performance evaluation of the plants/biomass wastes extracts as corrosion inhibitors. The conclusion is that no single mechanism of antioxidant actions and anticorrosive protection is operative in plant/wastes extracts. The high inhibitory efficiency is predicated on a number of complementary processes working holistically. By developing the theoretical basis and mechanism of action between the anticorrosive and antioxidant properties of plant extracts, it is possible to create predictive tools for selecting plant extract and further obtaining anti-corrosion protection based on it.

Keywords: green corrosion inhibitors, antioxidant/free radical scavenging activity, phytochemicals, metals and alloys

Int. J. Corros. Scale Inhib., 2019, 8, no. 2, 150-178 PDF (1 222 K)
doi: 10.17675/2305-6894-2019-8-2-1

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