Enhanced Corrosion Protection of the Ionic liquid doped-Polypyrrole/MWCNT Composite Coating on Stainless Steel

Yilmaz S. M., Yazar Aydoğan S., Acar E., Atun G.

SYNTHETIC METALS, cilt.302, sa.302, ss.117540, 2024 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 302 Sayı: 302
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.synthmet.2024.117540
  • Dergi Adı: SYNTHETIC METALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.117540
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

Composite coatings were deposited on type of 430 stainless steel (SS) by one-step electrochemical process by adding Tetra Butyl Phosphonium Bromide (TBPB) ionic liquid and Multi-Walled Carbon Nanotube (MWCNT) to the sulfuric acid-polypyrrole medium. The coating conditions were optimised by changing potential range, scan rate and number of cycles. The protectivity of all polypyrrole/TBPB and polypyrrole/TBPB-MWCNT composite coatings was investigated in NaCl (3.5%) and 0.5 M sulfuric acid solution. The composite electrode prepared in 0.02 M TBPB and 5.0 mg MWCNT medium was found to be the best protective coating. Electrochemical measurements were performed by using potentiodynamic polarization (PDP) and electrochemical-impedancespectroscopy (EIS) techniques. Althougt the corrosion protection efficiency of the coating was higher than its initial value in both media during long-term immersion until 504 h, the steel coated with the polypyrrole/TBPB/ MWCNT composite was represented more protective efficiency in H2SO4 compared to NaCl solution.