Liriope platyphylla extract as a green inhibitor for mild steel corrosion in sulfuric acid medium

The phytochemical components of the methanol extract of Liriope platyphylla (L. platyphylla) leaves were identified using UHPLC, and their antioxidant activities were studied. The impact of the L. platyphylla extract on the corrosion of mild steel by 1 M H2SO4 was assessed using electrochemical and gravimetric techniques. L. platyphylla exhibited concentration-dependent corrosion protection activity through a mixed-mode adsorption process, as revealed by polarization studies. Impedance measurements indicated the development of a protective film of the inhibitor, which was confirmed by morphology studies at the micro level with scanning electron microscopy (SEM) and at the nano level with atomic force microscopy (AFM). Fourier transform infrared (FT-IR) studies also confirmed the adsorption of the inhibitor film onto the mild steel surface.

Automated summary

The methanol extract of Liriope platyphylla leaves was found to have antioxidant activities and exhibited concentration-dependent corrosion protection activity on mild steel corroded by 1 M H2SO4 through an adsorption process. The development of a protective film of the inhibitor was confirmed by morphology studies at the micro and nano level, as well as Fourier transform infrared studies.