Insight into the anti-corrosion mechanism Veratrum root extract as a green corrosion inhibitor

The anticorrosive effect of Veratrum root extract (VRE) as the inhibitor for copper corrosion in H2SO4 solution was studied by electrochemical experiments and quantum chemistry calculation. The electrochemical experiments manifested that VRE exhibited good anticorrosion performance at a range of tested temperatures, which was further manifested by surface characterizations. The results of the Tafel test indicate that VRE belong to mixed corrosion inhibitors, which can simultaneously control the cathodic and anodic reactions of the Cu electrode. When the concentration of VRE is 200 ppm, its anti-corrosion efficiency can reach 97%. Quantum chemical calculation was employed to manifest the mechanism of adsorption and the relationship between the electronic structure of inhibitors and their anticorrosion performance. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study found that Veratrum root extract (VRE) has a good anticorrosive effect as an inhibitor for copper corrosion in H2SO4 solution, with an efficiency of up to 97%, and belongs to mixed corrosion inhibitors.