Abstract

R. Thilagavathi, A. Prithiba and R. Rajalakshmi*

DOI : http://dx.doi.org/10.13005/ojc/350129

The inhibition for the corrosion of mild steel in acid solution by the extract of Sargassum polycystum seaweed was studied using electrochemical technique and mass loss method. The results obtained show that the seaweed extract could serve as an effective inhibitor for the corrosion of mild steel in acidic medium. It was noticed that the inhibitor concentration, immersion time and temperature influenced the IE. The adsorption of the Sargassum polycystum  extract molecules onto the metal surface obeyed Langmuir adsorption isotherm. Surface topography studies suggested the protection of MS surface from corrosion by the adsorption of inhibitor molecules onto the MS surface.

Corrosion Inhibition; Electrochemical Impedance Spectra; and Potentiodynamic Polarization; Sargassum Polycystum

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