پديدآورندگان :
Suleymani Amin Electrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran , Hosseini Mir Ghasem mg-hosseini@tabrizu.ac.ir Electrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran, , Abasht B Space Exploration Research Center, Tabriz, Iran
چكيده فارسي :
Electroless Ni-P coatings are widely used for corrosion protection in a variety of environments[1]. In this research different concentrations of PTFE (0-5-10-15-20-30 wt. %) were applied to Ni-P-PTFE composite, in order to enhance lubricant characteristics of the composite. Nickel sulfate, PTFE, NaH2PO2 electroplating bath was used to prepare composites on mild steel. Bath temperature was set to 90±2. Surface morphology and elemental analysis of prepared composites were investigated using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. Among the various techniques for the determination of corrosion resistance, electrochemical impedance spectroscopy (EIS) is considered to be superior as it provides not only an assessment of the corrosion resistance of different deposits but also enables the mechanistic pathway by which the deposits become corroded to be determined. Tafel corrosion test was also used to determine corrosion resistance of composites in order to confirm EIS results. Electrochemical results revealed that PTFE 20 g L-1 sample had the best corrosion resistance.
