پديدآورندگان :
Abdolmaleki Mehdi m.abdolmaleki@sjau.ac.ir Faculty of Science, Department of Chemistry, Sayyed Jamaleddin Asadabadi University,Asadabad, Iran; E-mail: , Allahgholipour Gholam Reza Faculty of Science, Department of Chemistry, Sayyed Jamaleddin Asadabadi University,Asadabad, Iran; , Goudarziafshar Hamid Faculty of Science, Department of Chemistry, Sayyed Jamaleddin Asadabadi University,Asadabad, Iran; , Moosavi-zare Ahmad Reza Faculty of Science, Department of Chemistry, Sayyed Jamaleddin Asadabadi University,Asadabad, Iran;
كليدواژه :
Ni , W , PTFE , Nanocomposite , Corrosion , Electrochemical Impedance Spectroscopy
چكيده فارسي :
Metal matrix composites are materials in which the properties of a metallic host material are modified by the addition of a different type material (for example a ceramic) [1-3]. The present work aims to prepare electrodeposited Ni-W/PTFE composite coatings using four different PTFE plating baths and to evaluate their corrosion behavior by open circuit potential (EOCP), electrochemical impedance spectroscopy (EIS) and polarization studies in 1N H2SO4 solution. The surface morphology and composition of the composite coatings were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) measurements and X-ray diffraction analysis (XRD). The SEM and XRD results presented that the incorporation of PTFE particles causes a significant change in structure of the Ni-W/PTFE composite coatings. The corrosion study exhibited significant shift in corrosion potential towards the noble direction, decrease in corrosion current density, increase in charge transfer resistance and decrease in double‐layer capacitance values with the incorporation of PTFE particles in the Ni-W matrix.
