Solanum lasiocarpum L. Extract as Green Corrosion Inhibitor for A3 Steel in 1 M HCl Solution

摘要

An extract of Solanum lasiocarpum L. (SL) was characterized and tested for its potential anticorrosioneffect on A3 steel in a 1 M HCl solution using weight loss analysis, potentiodynamic polarizationmeasurements, electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy andscanning electron microscopy (SEM). The electrochemical and weight loss results revealed that the SLextract was an efficient corrosion inhibitor with an inhibition efficiency of up to 93.31% at aconcentration of 1 g/L, which was further confirmed by SEM observations. The adsorption processmainly comprised physisorption and chemisorption (comprehensive adsorption), and obeyed theLangmuir model. The SL extract is a mixed inhibitor that predominantly suppresses the cathodicreaction.