An ecofriendly approach for corrosion control of 6061 Al-15%(v) SiC(P) composite and its base alloy

doi:10.1016/j.cjche.2016.08.007

Abstract

Abstract: Corrosion inhibition characteristics of bio polymer dextran was studied for the corrosion control of 6061 Al-15%_(v) SiC_(p) composite and its base alloy in 1 mol·L^-1 HCl. Standard electrochemical techniques such as potentiodynamic polarization (PDP) measurements and electrochemical impedance spectroscopy (EIS) method were adopted for corrosion rate measurement. Surface morphology was studied by scanning electron microscopy (SEM) and elemental mapping was done by energy dispersive X-ray (EDX) analysis. Suitable mechanism was proposed for corrosion and inhibition process. Results indicated that dextran acts as an excellent anticorrosive agent for the corrosion control of 6061 Al-15%_(v) SiC_(p) composite, with maximum inhibition efficiency of 91% for the concentration of 0.4 g·L^-1 at 303 K. Dextran acted as a mixed type of inhibitor, and got physically adsorbed both on composite and base alloy by obeying Langmuir adsorption isotherm. Dextran is proved to be a green inhibitor with environmental and economic benefits.

Key words: 6061 Al-15%_(v) SiC_(p) composite, Green inhibitor, Biopolymer, Electrochemical studies, SEM-EDX

摘要： Corrosion inhibition characteristics of bio polymer dextran was studied for the corrosion control of 6061 Al-15%_(v) SiC_(p) composite and its base alloy in 1 mol·L^-1 HCl. Standard electrochemical techniques such as potentiodynamic polarization (PDP) measurements and electrochemical impedance spectroscopy (EIS) method were adopted for corrosion rate measurement. Surface morphology was studied by scanning electron microscopy (SEM) and elemental mapping was done by energy dispersive X-ray (EDX) analysis. Suitable mechanism was proposed for corrosion and inhibition process. Results indicated that dextran acts as an excellent anticorrosive agent for the corrosion control of 6061 Al-15%_(v) SiC_(p) composite, with maximum inhibition efficiency of 91% for the concentration of 0.4 g·L^-1 at 303 K. Dextran acted as a mixed type of inhibitor, and got physically adsorbed both on composite and base alloy by obeying Langmuir adsorption isotherm. Dextran is proved to be a green inhibitor with environmental and economic benefits.

关键词: 6061 Al-15%_(v) SiC_(p) composite, Green inhibitor, Biopolymer, Electrochemical studies, SEM-EDX

Charitha B. P., Padmalatha Rao. An ecofriendly approach for corrosion control of 6061 Al-15%_(v) SiC_(P) composite and its base alloy[J]. , 2017, 25(3): 363-372.

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An ecofriendly approach for corrosion control of 6061 Al-15%_(v) SiC_(P) composite and its base alloy

An ecofriendly approach for corrosion control of 6061 Al-15%_(v) SiC_(P) composite and its base alloy

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