An electrochemical approach to evaluating surface coatings

DEMİRÖREN H., Buytoz S.

International Journal of Surface Science and Engineering, cilt.15, sa.4, ss.294-306, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 4
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1504/ijsurfse.2021.120962
  • Dergi Adı: International Journal of Surface Science and Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.294-306
  • Anahtar Kelimeler: Fe-based composite, Cr7C3 carbide, NbC carbide, EIS, Nyquist plot
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

In order to understand the influence of metal carbides and niobium carbides on electrochemical behaviour of Fe-based composite powder and FeNb powder coatings were added. Above mentioned composite layer was prepared on a medium carbon steel surface by using GTAW coating technique. The morphology of the coatings’ surface was analysed by optical microscope, scanning electron microscope (SEM) equipped with an energy-dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). Then the samples were exposed to seawater. Electrochemical impedance spectroscopy (EIS) method with triple electrode system was used in order to obtain Bode and Nyquist diagrams. Ag/AgCl electrode is used as reference electrode, and platin plate is counter electode in this system. As a result, adding NbC has harmful effect on the electrochemical behaviour of FeCrC coating powder.