Electrochemical Properties of TiWN/TiWC Multilayer Coatings Deposited by RF-Magnetron Sputtering on AISI 1060

Nitride and carbide ternary coatings improve the wear corrosion resistance of carbon steel substrates. In this work, Ti-W-N Ti-W-C were deposited on AISI 1060 substrates using reactive radio frequency (RF) magnetron sputtering. The designed as monolayers, bilayers, multilayers 40 periods. obtained with simultaneous sputtering Ti W targets. microstructure, composition, electrochemical properties investigated by techniques such X-ray diffraction (XRD), photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force (AFM), impedance (EIS), potentiodynamic polarization. XRD results shower a mix binary TiN W2N structures in layer, phase layers, addition quaternary Ti-W-CN multilayers. analysis XPS demonstrated that concentration was more significant than layers. lowest rate (0.19 mm/year−1) highest (~10 kΩ·cm2) out all found n = bilayers. simulation equivalent electrical circuits, it coating presented three processes (Pore + Coating Inductance). However, multilayer (n 40) system major dielectric constant through electrolyte adsorption; therefore, caused an increase capacitance coating.