| Electrochemical studeis of anti-corrosion properties of novel poly- aniline and cobalt ferrite nanocomposite |
| کد مقاله : 1076-CNF (R1) |
| نویسندگان |
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شکوفه رضوانی نیا *1، علی بابایی2، مریم ایرانپور3 1دانشگاه یزد 2اراک- دانشگاه اراک- دانشکده علوم پایه- گروه شیمی 3دانشگاه اراک- دانشکده علوم پایه-گروه شیمی |
| چکیده مقاله |
| In this study, CoFe2O4 nanoparticles were synthesized by co-precipitation method, the nanocomposite of polyaniline and CoFe2O4 nanoparticles were prepared through a two-step oxidative polymerization, Fe3+ and ammonium persulfate (APS) was used as the oxidant in each stage [1,2]. The nanocomposites producted with a ratio of 1:1, 1:2 and 2:1 composite component. The cover of the nanocomposites was coated on the carbon steel surface using the immersion technique for an hour and performance of the synthesized compounds as corrosion inhibitor for low-carbon steel in NaCl 3.5% was investigated through various electrochemical techniques such as open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) [3,4]. The structure and morphology of the magnetic nanocomposites were studied by FT-IR and SEM. It was found that the CoFe2O4 /PAni (1:1) nanocomposite coating has ability to protect carbon low steel against corrosion in a solution of NaCl 3.5%. Obtained results from the Tofel plots showed a decrease in current density and corrosion rate. The corrosion current density was decreased of 0/2443 𝜇𝐴 to 0/0360 𝜇𝐴 for uncoated carbon steel electrode and the corrosion potential shifted to more negative values. This behavior showed good performance of the coating for decrease the corrosion reaction. Electrochemical impedance spectroscopy data showed that charge transfer resistance for electrode without coating increased from 82Ω to 1970Ω. SEM images confirmed the ability of this coating in corrosion protection. The percentage inhibition efficiency was calculated to be 95.83% for CoFe2O4 /PAni nanocomposite. |
| کلیدواژه ها |
| Magnetic nanoparticles CoFe2O4, Polyaniline, Corrosion, Low-carbon steel. |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |