Elsevier

Vacuum

Volume 53, Issues 1–2, May 1999, Pages 117-121
Vacuum

Corrosion performance of CrN/NbN superlattice coatings deposited by the combined cathodic arc/unbalanced magnetron technique

https://doi.org/10.1016/S0042-207X(98)00405-9Get rights and content

Abstract

Potentiodynamic polarisation experiments have been used to evaluate the corrosion performance of novel CrN/NbN superlattice coatings in comparison with a commercial CrN coating and a 304L control specimen. In addition, electrochemical impedance has been used to determine the effective surface area of the coatings by capacitance measurements. Results indicate that the superlattice coatings have significantly improved barrier properties evidenced by increases in pitting potentials of up to 500 mV compared with 304L. Furthermore, the impedance evidence indicates that CrN has comparatively large pores while the superlattice coatings have extensive, but diffuse and fine-scale, surface porosity confirming that the corrosion performance improvement is most likely due to microstructural enhancements.

References (0)

Cited by (38)

  • Defect growth in multilayer chromium nitride/niobium nitride coatings produced by combined high power impulse magnetron sputtering and unbalance magnetron sputtering technique

    2017, Thin Solid Films
    Citation Excerpt :

    For this study the CrN/NbN coating was considered because of its wide industrial applications in recent years as a protective material due to the high hardness, good wear resistance and anticorrosive properties [1,21,22]. The excellent performance of nanoscale CrN/NbN coatings in various applications such as pump impellers, hydraulic valves, nozzles, pistons and sharp edges (cutting blades) has been previously demonstrated [22–24]. Surface imperfections have not proved to be detrimental in any of the above mentioned applications; however advanced coating applications (biomedical and industrial) demands thorough investigation of the growth defects to aid better understanding of their influence on the overall coating performance.

  • Effect of deposition method on tribological performance and corrosion resistance characteristics of Cr<inf>x</inf>N coatings deposited by physical vapor deposition

    2017, Thin Solid Films
    Citation Excerpt :

    For example, Liu et al. studied the corrosion resistance of CrN and TiN coatings that were deposited in a magnetron sputtering system onto mild steel substrates [15,28,29]. Further, studies of the ability of chromium-based gradient, duplex and ternary coatings to improve wear resistance [22] and provide corrosion protection have been reported [30–36]. For example, Jagielski et al. [37] reported that 1.2 μm thick CrxN coatings synthesized by ion beam assisted deposition (IBAD) have the ability to provide corrosion and wear protection to stainless steel.

  • Wear mechanism of CrN/NbN superlattice coating sliding against various counterbodies

    2013, International Journal of Refractory Metals and Hard Materials
    Citation Excerpt :

    High coating hardness has been observed for TiN/VN [11] and TiN/NbN [12,13] multilayer coatings. Both improved corrosion resistance and decreased erosive and abrasive wear rates due to multilayer structures have also been reported for CrN/NbN [14] and TiN/CrN systems [15]. The properties of these coatings are dependent on the period of the individual layers in the structure.

View all citing articles on Scopus
View full text