Gundelia tournefortii extract as a green corrosion inhibitor for mild steel in H(2)SO(4) solution

The inhibitive action of Gundelia tournefortii extract on corrosion of mild steel in 1 M H(2)SO(4) solution was investigated through weight loss measurement as well as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Polarization measurements indicate that all the examined compounds act as a mixed inhibitor and inhibition efficiency increases with inhibitor concentration. EIS measurements show an increase of the transfer resistance with increasing inhibitor concentration. Temperature studies revealed an increase in inhibition efficiency with rise in temperature and activation energies decreased in the presence of the extract. The adsorption of this plant extract on the mild steel surface obeys the Langmuir adsorption isotherm.

کلیدواژه ها:

Corrosion inhibition ، Gundelia tournefortii extract ، Green corrosion inhibitor ، Mild steel ، H(2)SO(4)