Based on three different fatty acids and 1, 4 butandiol, three novel anionic surfactants were prepared and examined as an aluminum corrosion inhibitor in1M hydrochloric acid solution. Weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy were used to study the corrosion inhibition efficiency (IE %) The results demonstrated that the obtained compounds have good inhibition efficiency even at low concentrations and the IE % increases
by increasing inhibitor concentrations, immersion time, and hydrophobic chain length. Also, the obtained compounds behave as mixed-type inhibitors without changing the electrode mechanism. The adsorption mechanism obeys Langmuir adsorption isotherm and the adsorption process is a spontaneous one. Through the biodegradability test, we find that the prepared inhibitors are suitable as environmentally friendly corrosion inhibitors. Finally, atomic force microscopy (AFM) technology was employed to study the impact of the addition of these compounds on the aluminum surface. |
