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Carbohydrate biopolymer for corrosion control of 6061 Al-alloy and6061Aluminum-15%(v)SiC(P)composite—Green approach

Charitha, B P and Padmalatha, * (2017) Carbohydrate biopolymer for corrosion control of 6061 Al-alloy and6061Aluminum-15%(v)SiC(P)composite—Green approach. Carbohydrate Polymers, 168 (1). pp. 337-345. ISSN 0144-8617

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Abstract

tThe acid corrosion control of 6061Aluminum alloy and 6061Al-15%(v) SiC(P)composite material (Al-CM)was carried by using inulin – a carbohydrate polymer as a green inhibitor. Potentiodynamic polarization(PDP) and Electrochemical Impedance Spectroscopy (EIS) techniques were adopted. Concentration ofinulin was in the range of 0.2 gL−1–1.0 gL−1, and studies were done in the temperature range of 303–323 K.The adsorption of inhibitor on the surface of Al alloy and Al-CM was confirmed by physical techniquessuch as Scanning electron microscopy (SEM), energy-dispersive X-Ray analysis (EDX), and atomic forcemicroscopy (AFM) analysis. The studies showed that inhibition efficiency of inhibitor increased withincrease in concentrations of inulin and decreased with increase in temperature. The adsorption of inulinon metal surface obeyed Langmuir adsorption isotherm through physical adsorption on both alloy andon Al-CM. Results obtained from potentiodynamic polarization method and electrochemical impedancespectroscopic methods were in good agreement with one another.

Item Type: Article
Uncontrolled Keywords: Inulin;Aluminum;Al-CM; SEM-EDXAFM
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 22 Apr 2017 10:47
Last Modified: 22 Apr 2017 10:47
URI: http://eprints.manipal.edu/id/eprint/148740

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