Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

الملخص EN

The inhibition efficiency (IE) of an aqueous extract of henna leaves in controlling corrosion of carbon steel in seawater has been evaluated by weight-loss method.

The weight loss study reveals that the formulation consisting of 8 mL of henna extract (HE) and 25 ppm of Zn2+ has 94% inhibition efficiency in controlling corrosion of carbon steel in sea water.

Polarization study reveals that HE and Zn2+ system functions as mixed type inhibitor.

AC impedance spectra reveal that protective film is formed on the metal surface.

The nature of the metal surface has been analysed by FTIR spectra, SEM, and AFM analysis.