Corrosion Inhibition Behavior and Adsorption Mechanism of Ethyl Acetate Extract from Scorzonera Undulata for Carbon Steel in 1 M HCl Solution.

For carbon steel X70 in a 1 M hydrochloric acid solution, Scorzonera undulata acetate extract (SUAc) was investigated as an ecological corrosion inhibitor. The anti-corrosion effect of Scorzonera undulata extract is studied using potentiodynamic polarization analysis and electrochemical impedance spectroscopy (EIS). The polarization curves clearly show that the extract is an excellent mixed inhibitor.