کلیدواژهها
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ZrN/CrN multilayer, nanostructured coating, PVD, CAE, polarization, EIS
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چکیده
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In this research, a ZrN/CrN multilayer nanostructured coating was applied on AISI 304stainless steel
substrate using physical vapor deposition (PVD) in type of cathodic arc evaporation (CAE). The
microstructure evaluation of the specimens were analyzed by x-ray diffraction and scanning electron
microscopy. Impedance spectroscopy tests were utilized to evaluate the corrosion behavior of ZrN/
CrN multilayer nanostructured coating and the substrate in 3.5 wt% NaClsolution. Applying CAE
technique, ZrN/CrN multilayer nanostructured coating having high density and adhesion was
successfully made. The corrosion results revealed that ZrN/CrN multilayer nanostructured coatings
had an exceptionally high polarization resistance compared to AISI 304 stainless steel substrate.
Moreover, the corrosion results showed the desired corrosion behavior in the ZrN/CrN multilayer
nanostructured coating towards the AISI 304 substrate within the 3.5 wt% NaCl solution due to the
presence of distinct layer resulting in a barrier against penetration of the corrosive solution. Scanning
electron microscopy micrographs revealed that the surface of the ZrN/CrN multilayer coating is free
of pits or anyserious damage.
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