LB films of octadecanoyl hydroxamic acid as barrier against copper corrosion

Abstract EN

Free of ions of Octadecanoyl monohydroxamic acid (C18N) and in the presence of Fe3+ ion multilayers were deposited on the copper surface as Langmuir-Blodgett (LB) films.

their inhibiting effect on copper corrosion was investigated in 0.1 M sodium sulfate solution by different techniques such as potentiodynamic polarization and by electrochemical impedance spectroscopy (EIS).

as well as that, the copper surfaces were visualized using a Scanning electron microscope (SEM).

the results showed that the highest inhibition efficiency (92 %) was achieved by LB film of 5 monomolecular layers of C18N / Fe3 +.

the LB films work as a cathodic inhibitor which inhibits the cathodic reaction.

the presence of Fe3 + ions significantly improves the inhibition efficiency through the formation of a more compact dense layer of C18N / Fe3 + complex that blocks the flux of aggressive ions to the metal surface.

the effect of immersion time on the inhibiting characteristics of LB films on the copper surfaces was studied.