Corrosion inhibition of 6061 aluminium alloy/SiCp composite in hydrochloric acid medium using 3-chloro-1-benzothiophene-2-carbohydrazide

Kini, Achutha U and Shetty, Prakash and Shetty, Divakara S and Isloor, Arun M (2011) Corrosion inhibition of 6061 aluminium alloy/SiCp composite in hydrochloric acid medium using 3-chloro-1-benzothiophene-2-carbohydrazide. Indian Journal of Chemical Technology, 18. pp. 439-445. ISSN 0971-457X

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Abstract

The inhibitive action of 3-chloro-1-benzothiophene-2-carbohydrazide (CBTC) on the corrosion behavior of 6061 Al alloy/SiCp composite has been studied at four different temperatures (30⁰, 40⁰, 50⁰ and 60⁰C) in hydrochloric acid medium (0.5 and 1 M) using Tafel extrapolation technique and weight loss method. Polarization curves indicate that CBTC act as cathodic inhibitor. Inhibition efficiency is found to increase with increasing inhibitor concentration upto a critical value and decreasing temperature. The inhibition efficiencies obtained by Tafel extrapolation technique and weight loss method are in good agreement. The adsorption of the inhibitor on the composite surface is found to obey Temkins’ and Langmuir adsorption isotherms. The inhibition is governed by physisorption mechanism.

Item Type: Article
Uncontrolled Keywords: Composite materials, Corrosion inhibition, Electrochemical technique, Physical adsorption.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 26 Dec 2013 11:04
Last Modified: 26 Dec 2013 11:04
URI: http://eprints.manipal.edu/id/eprint/137693

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