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

TOMLINSON, M., LYON, S. B., HOVSEPIAN, P. E. and MUNZ, W. D. (1999). Corrosion performance of CrN/NbN superlattice coatings deposited by the combined cathodic arc unbalanced magnetron technique. Vacuum, 53 (1-2), 117-121.

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Link to published version:: 10.1016/S0042-207X(98)00405-9

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. (C) 1999 Elsevier Science Ltd. All rights reserved.

Item Type: Article
Additional Information: 14th International Vacuum Congress/10th International Conference on Solid Surfaces/5th International Conference on Nanometre-Scale Science and Technology/10th International Conference on Quantitative Surface Analysis AUG 31-SEP 04, 1998 BIRMINGHAM, ENGLAND
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1016/S0042-207X(98)00405-9
Depositing User: Ann Betterton
Date Deposited: 15 Feb 2010 15:55
Last Modified: 15 Feb 2010 15:55
URI: http://shura.shu.ac.uk/id/eprint/1152

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