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标题：Starch as an ecofriendly green inhibitor for corrosion control of 6061-Al alloy
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作者：Charitha B.P. ; Padmalatha Rao
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：1
页码：78-89
出版社：University of Mohammed Premier Oujda
摘要：The corrosion inhibition characteristics of biopolymer starch was studied as an ecofriendly inhibitor for thecorrosion control of 6061 aluminum alloy in 0.1M HCl. Electrochemical methods such as potentiodynamicpolarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques were adopted. Effect ofinhibitor concentrations (in the range of 100 to 800ppm) was studied at temperatures of 30, 35, 40, 45 and 50℃.The kinetic and thermodynamic parameters for corrosion and inhibition process were determined. The surfacemorphology of aluminum in the absence and presence of starch in 0.1M HClsolution was studied using ScanningElectron Microscope (SEM) and Electron Dispersive x-ray spectroscopy (EDX). Suitable mechanism wasproposed for corrosion and inhibition process. The percentage inhibition efficiency of starch increased withincreasing inhibitor concentrations and also with increase in temperature. Starch acted as a mixed inhibitor,underwent chemical adsorptionand obeyed Langmuir adsorption isotherm.Starch – a biodegradable polymeremerged as a potential, cost effective environmentally begin inhibitor for the corrosion control of 6061-aluminuminHCl.
关键词：6061;Al alloy; Hydrochloric acid; Potentiodynamic polarization; EIS; adsorption isotherm; SEM;EDX