Effect of Ethyl-2-phenyl-hydrozono-3-oxobutyrate on the Corrosion inhibition of AA 6061 in HCl medium

Kini, Achutha U and Jagannath, K and Sharma , S S and Bhat, Chandrashekhar and Shetty, Prakash and Shetty, Divakara S (2013) Effect of Ethyl-2-phenyl-hydrozono-3-oxobutyrate on the Corrosion inhibition of AA 6061 in HCl medium. International Journal of Research in Engineering and Technology (IJRET), 2 (3). pp. 132-136. ISSN 2277 – 4378

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Abstract

The effect of Ethyl-2-phenyl-hydrozono-3-oxobutyrate (EPHO) on the corrosion inhibition of AA 6061 in 0.5 M hydrochloric acid medium at 30, 40 and 50 ⁰C have been investigated using Tafel extrapolation and linear polarization techniques. It is evident from the results that EPHO is an efficient inhibitor with 91 % inhibition efficiency in the range of temperatures studied. Leftward and downward shifts in Tafel plots with the addition of the inhibitor, indicates that EPHO inhibits the corrosion process and acts as a cathodic inhibitor. With the increase in temperature, corrosion rate increases and inhibition efficiency decreases. Results obtained by both Tafel extrapolation and linear polarization techniques are in good agreement. The adsorption of EPHO on the surface of AA 6061 is found to obey Temkins’ adsorption isotherm that verifies the assumption of mono-layer adsorption on a uniform homogeneous composite surface with an interaction in the adsorption layer.

Item Type: Article
Uncontrolled Keywords: Tafel Extrapolation Technique, Temkins’ Adsorption Isotherm, Cathodic Inhibitor, Physical Adsorption.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 24 Sep 2013 09:59
Last Modified: 24 Sep 2013 09:59
URI: http://eprints.manipal.edu/id/eprint/137268

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