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    Öğe
    An electrochemical approach to evaluating surface coatings
    (Inderscience, 2021) Demirören, Hülya; Buytoz, Soner
    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.
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    Öğe
    Effect of High-Chromium Ferrous-Based TiC Composite Coating on Microstructural and Corrosion Properties of Steels
    (Springer, 2023) Buytoz, Soner; Demirören, Hülya; Kaya, Esad
    Coatings are generally one of the surface protection methods used to prevent corrosion damage. However, coatings with a lean chemical content usually perform low corrosion resistance. Additive carbides could be added to enhance the corrosion resistance of the coatings. Hence, the current study focuses on the effect of TiC addition on FeCrC powder, which is frequently used as a coating material. Different proportions of TiC powder were added to FeCrC powder. 42CrMo4 steel plate was used as substrate. A gas tungsten arc (GTA) welding device was used as the energy source in the coating process. Corrosion tests were performed via a standard three-electrode system. TiC improved the corrosion resistance of FeCrC coating. The corrosion rate was observed to have an inverse proportion of TiC amount in the coating. The sample with the highest TiC powder concentration has the lowest calculated corrosion rate (25 wt %) as 2 × 10–6 (A/mm2).
  • [ X ]
    Öğe
    Electrochemical Synthesis of High Chromium Fe-Based TiC Composite Coating
    (Maik Nauka/Interperiodica/Springer, 2022) Demiroren, Hulya; Buytoz, Soner
    In order to investigate the effect of M7C3 and TiC carbides on electrochemical synthesis behavior of Fe-Cr-C and Fe-Cr-C/TiC coatings, Fe-based composite layer was prepared on medium carbon steel surface by using tungsten inert gas coating technique. The microstructure and phase structure of the coatings were analyzed by optical microscope with clemex image analyse, scanning electron microscope (SEM) equipped with an energy-dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). The samples were exposed EIS (electrochemical impedance spectroscopy) method in sea water. Frequence diagrams and Nyquist diagrams were obtained. As a result, adding TiC improved the electrochemical behavior of FeCrC coating.