Çinko-Demir Kaplı Elektrot Yüzeyindeki Poli(anilin-co-pirol) ve Poli(anilin-co-N-metilpirol) Kopolimerlerin Korozyon Performansı

Yıl 2020, , 231 - 238, 28.06.2020

Abdurrahman Akdağ

https://doi.org/10.35193/bseufbd.653753

Öz

Poli(anilin-co-pirol) (PANI-co-PPy) ve poli(anilin-co-N-metilpirol) (PANI-co-PNMP) kopolimer filmler ZnFe kaplı karbon çelik (KÇ/ZnFe) elektrot yüzeyine elektrokimyasal olarak sentezlenmiştir. ZnFe kaplama için galvanostatik yöntem, kopolimer kaplamalar için ise dönüşümlü voltametri yöntemi kullanılmıştır. PANI-co-PPy film 0.05 M anilin + 0.05 M pirol içeren 0.3 M okzalik asit çözeltisinde sentezlenmiştir. PANI-co-PNMP film ise 0.05 M anilin + 0.05 M N-metilpirol içeren 0.3 M okzalik asit çözeltisinde sentezlenmiştir. PANI-co-PPy ve PANI-co-PNMP kopolimerleri ile kaplı elektrotlar doğrusal taramalı voltametri, elektrokimyasal empedans spektroskopisi ve anodik polarizasyon teknikleriyle karakterize edilmiştir. Doğrusal taramalı voltametri sonuçları kopolimer kaplamaların altında ZnFe alaşımının bulunduğunu göstermiştir. Elektrokimyasal empedans spektrsokopisi bulguları PANI-co-PNMP kaplı KÇ/ZnFe (KÇ/ZnFe/PANI-co-PNMP) elektrodun polarizasyon direncinin (Rp) PANI-co-PPy kaplı KÇ/ZnFe (KÇ/ZnFe/PANI-co-PPy) elektroda göre daha yüksek olduğunu ortaya koymuştur. Anodik polarizasyon eğrileri en düşük akım ve en yüksek korozyon potansiyeline sahip elektrodun KÇ/ZnFe/PANI-co-PNMP elektrot olduğunu göstermiştir.

Anahtar Kelimeler

Kopolimer, korozyon, elektrokimyasal sentez, anilin, pirol

Teşekkür

Bu çalışma Harran Üniversitesi Bilimsel Araştırma Projeleri Birimi tarafından desteklenmiştir.

Corrosion Performance of Poly(aniline-co-pyrrole) and Poly(aniline-co-N-methylpyrrole) Copolymers on Zinc-Iron Plated Electrode

Öz

Poly(aniline-co-pyrrole) (PANI-co-PPy) and poly(aniline-co-N-methylpyrrole) (PANI-co-PNMP) copolymer films were electrochemically synthesized on the ZnFe coated carbon steel (KC/ZnFe) electrode surface. Galvanostatic method is used for ZnFe coating and cyclic voltammetry method is used for copolymer coatings. PANI-co-PPy film was synthesized in 0.30 M oxalic acid solution containing 0.05 M aniline + 0.05 M pyrrole. PANI-co-PNMP film was synthesized in 0.30 M oxalic acid solution containing 0.05 M aniline + 0.05 M N-methylpyrrole. Electrodes with coated PANI-co-PPy and PANI-co-PNMP copolymers were characterized by linear sweep voltametry, electrochemical impedance spectroscopy and anodic polarization techniques. The linear sweep voltammetry results indicated that the ZnFe alloy was under the copolymer coatings. The electrochemical impedance spectroscopy findings revealed that the polarization resistance (Rp) of the PANI-co-PNMP coated KC/ZnFe (KC/ZnFe/PANI-co-PNMP) electrode was higher than that of the PANI-co-PPy coated KC/ZnFe (KC/ZnFe/PANI-co-PPy) electrode. The anodic polarization curves showed that the electrode with the lowest current and highest corrosion potential is the KC/ZnFe/PANI-co-PNMP electrode.

Anahtar Kelimeler

Copolymer, corrosion, electrochemical synthesis, aniline, pyrrole

Kaynakça

• Ates, M., Kalender, O., Topkaya, E., Kamer, L. (2015). Polyaniline and polypyrrole/TiO2 nanocomposite coatings on Al1050: electrosynthesis, characterization and their corrosion protection ability in saltwater media. Iran. Polym. J. 24, 607–619.
• Su, W., Iroh, J.O. (2000). Electrodeposition mechanism, adhesion and corrosion performance of polypyrrole and poly(N-methylpyrrole) coatings on steel substrates. Synth. Met. 114, 225–234.
• Ocón, P., Cristobal, A.B., Herrasti, P., Fatas, E. (2005). Corrosion performance of conducting polymer coatings applied on mild steel. Corros. Sci. 47, 649–662.
• González, M.B., Saidman, S.B., (2011). Electrodeposition of polypyrrole on 316L stainless steel for corrosion prevention. Corros. Sci. 53, 276–282.
• Özyilmaz, A.T., Aydin, A.E., Akdag, A. (2014). Anticorrosive properties with catalytic behaviour of primer PANI film and top PPy coating synthesised in presence of novel norephedrine based amino alcohol compound. Trans. Inst. Met. Finish. 92, 34-40.
• Zhang, Y., Shao, Y., Liu, X., Shi, C., Wang, Y., Meng, G., Zeng, X., Yang, Y. (2017). A study on corrosion protection of different polyaniline coatings for mild steel. Prog. Org. Coatings. 111, 240–247.
• Martins, N.C.T., Moura e Silva, T., Montemor, M.F., Fernandes, J.C.S., Ferreira, M.G.S. (2008). Electrodeposition and characterization of polypyrrole films on aluminium alloy 6061-T6. Electrochim. Acta. 53, 4754–4763.
• Rizzi, M., Trueba, M., Trasatti, S.P. (2011). Polypyrrole films on Al alloys: The role of structural changes on protection performance. Synth. Met. 161, 23–31.
• Pawar, P., Gaikwad, A.B., Patil, P.P. (2007). Corrosion protection aspects of electrochemically synthesized poly(o-anisidine-co-o-toluidine) coatings on copper. Electrochim. Acta. 52, 5958–5967.
• Patil, S., Sainkar, S.R., Patil, P.P. (2004). Poly(o-anisidine) coatings on copper: Synthesis, characterization and evaluation of corrosion protection performance. Appl. Surf. Sci. 225, 204–216.
• Ozyilmaz, A.T., Akdag, A. (2013). Corrosion protection provided by homo- and copolymer films synthesised in various oxalic and sulphamic acid electrolyte mixtures. Trans. Inst. Met. Finish. 91, 44–51.
• Yalçinkaya, S., Tüken, T., Yazici, B., Erbil, M. (2008). Electrochemical synthesis and corrosion performance of poly(pyrrole-co-o-anisidine). Prog. Org. Coatings. 62, 236–244.
• Breslin, C.B., Fenelon, A.M., Conroy, K.G. (2005). Surface engineering: corrosion protection using conducting polymers. Mater. Des. 26, 233–237.
• Mert, B.D., Yazici, B. (2011). The electrochemical synthesis of poly(pyrrole-co-o-anisidine) on 3102 aluminum alloy and its corrosion protection properties. Mater. Chem. Phys. 125, 370–376.
• Martins, J.I., Reis, T.C., Bazzaoui, M., Bazzaoui, E.A., Martins, L. (2004). Polypyrrole coatings as a treatment for zinc-coated steel surfaces against corrosion. Corros. Sci. 46, 2361–2381.
• Mert, B.D., Solmaz, R., Kardaş, G., Yazıcı, B. (2011). Copper/polypyrrole multilayer coating for 7075 aluminum alloy protection. Prog. Org. Coatings. 72, 748–754.
• Akdag, A., Ozyilmaz, G., Ozyilmaz, A.T. (2018). Poly(2-chloroaniline) and poly(aniline-co-2-chloroaniline) films on ZnFe alloy plating. Anti-Corrosion Methods Mater. 65, 580–586.
• Ozyilmaz, A.T., Ozyilmaz, G., Karahan, I.H. (2016). The formation of passive layers on zinc based platings. Acta Chim. Slov. 63, 809–821.
• Akdag, A., Ozyilmaz, A.T. (2017). Poly(N-methylpyrrole) film on ZnNi plated carbon steel electrode. Acta Chim. Slov. 64, 312–318.