Author/Authors :
Shabani-Nooshabadi، M. نويسنده Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran. , , Ghoreishi، S. M. نويسنده Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran. , , Eghbali-Bidgoli، H. نويسنده Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran. , , Jafari Ahangari، Y. نويسنده Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, Golestan, Gorgan, Iran ,
Abstract :
در اين مقاله نانوكامپوزيت پلي آنيلين-Fe2O3 پوشش داده شده بر روي آلياژآلومينيوم5052 با استفاده از روش گالوانوستاتيك بررسي شد. كارايي ضدخوردگي نانوكامپوزيت در 3.5 درصد NaCl با پتانسيل مدار باز ، تكنيك پلاريزاسيون تافل و اسپكتروسكوپي امپدانس الكتروشيميايي بررسي شد. به هنگام استفاده از نانوكامپوزيت پلي آنيلين-Fe2O3سرعت خوردگي 140 برابر كاهش مي يابد. نتايح اين تحقيق به خوبي نشان مي دهد كه مي توان از اين نانوكامپوزيت براي محافظت از آلياژ آلومينيوم 5052 در محيط NaCl استفاده كرد.
Abstract :
The synthesis of polyaniline- Fe2O3 nanocomposite coating on
aluminum Alloy 5052 (AA5052) surface has been investigated by
using the galvanostatic method. The anticorrosion performance of
polyaniline-Fe2O3 coating was investigated in 3.5% NaCl solution by
the open- circuit potential (OCP), Tafel polarization technique and
Electrochemical Impedance Spectroscopy (EIS). The corrosion rate of
polyaniline-Fe2O3 nanocomposite coating AA5052 was found
about140 times lower than bare AA5052. Corrosion potential also
decreased from -0.710 V to -0.735 V versus Ag/AgCl for uncoated
AA5052 and polyaniline-Fe2O3 nanocomposite coated on AA5052
electrodes, respectively. Electrochemical measurements show that
polyaniline-Fe2O3 nanocomposite coated has good inhibitive
properties with PE% of ~97.3% at 25 mA cm-2
current density applied
on AA5052 corrosion in a chloride media. The results of this study
clearly find out that the polyaniline-Fe2O3 nanocomposite has an
outstanding possible to protect AA5052 against corrosion in a chloride
environment.
