Kini, Achutha U and Sharma , S S and Jagannath, K and Prabhu, P R and Bhat, Chandrashekhar and Shetty, Prakash and Shetty, Divakara S and Isloor, Arun M (2014) Comparative Study of EPHO and CBTC as Corrosion Inhibitors for 15 vol. % 6061 al Alloy/SiCp Composite in 1 M Hydrochloric Acid Medium. In: 3rd World Conference on Applied Sciences, Engineering and Technology, 27-29 September 2014, Kathmandu, Nepal.

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Abstract

The corrosion inhibition effect of Ethyl-2-phenyl hydrozono-3-oxobutyrate (EPHO) and 2-chloro-1-benzothiophene-3-carbohydrazide (CBTC) on 6061 Al alloy/SiCp composite in 1 M hydrochloric acid solution at 30, 40, 50 and 60 °C has been investigated using potentiostatic polarization technique and weight loss method. Both EPHO and CBTC are efficient cathodic inhibitors with 82 % and 88% inhibition efficiencies. The adsorption of the inhibitors on the composite surface was found to obey Langmuir adsorption isotherm and the inhibition is governed by mixed adsorption mechanism.

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