Application of Electrochemical Noise to Investigate Corrosion Inhibition Properties of Some Azole Compounds on Aluminum in 0.25 M HCl

Journal: Vol.8, No.1, Winter 2015 - Article 7   Pages :   Until 

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B. Ramezanzadeh: Institute for Color Science and Technology - Department of Surface Coating and Corrosion
M. Mehdipour: Amirkabir University of Technology - Department of minning and Material Engineering
S. Y. Arman: Amirkabir University of Technology - Department of minning and Material Engineering

Article's abstract:

The corrosion inhibition properties of the benzothiazole BTH and benzotriazole BT inhibitors on the aluminum in 0.25 M HCl solution were studied. Electrochemical impedance spectroscopy EIS, electrochemical noise EN and potentiodynamic polarization techniques were used to investigate the inhibition properties of the inhibitors. Scanning electron microscope SEM was also utilized in order to investigate the surface morphology of the samples. Results showed that benzotriazole BT and benzothiazole BTH reduced the corrosion rate of the aluminum significantly. A higher corrosion inhibition efficiency of the BT compared with BTH was obtained. It was shown that EN is an appropriate technique for studying the corrosion inhibition properties of the corrosion inhibitors.

Aluminum; corrosion inhibitors; electrochemical impedance spectroscopy (EIS); electrochemical noise resistance

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