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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1686

Title: Structure and properties of CrxN coating
Authors: Basu, A
Majumdar, J Dutta
Manna, I
Keywords: Plating
Nitriding
Wear
Corrosion
Steel
Issue Date: 2012
Publisher: Maney on behalf of Institute of Materials, Minerals and Mining
Citation: Surface Engineering 2012 VOL 28 NO 3 199
Abstract: In the present study, an attempt has been made to produce a coating of mixed nitride (CrN and Cr2N) of ultrafine size on a low alloy high carbon steel by a two-stage hybrid process comprising electrodeposition of Cr (45–85 mm) followed by gas nitriding in controlled atmosphere (using a gas mixture of NH3/Ar51 : 3) in the temperature range 750–950uC for 2–6 h. The nitrided surface records extremely high hardness (y19 GPa), enhanced wear resistance and residual compressive stress. Potentiodynamic polarisation test in a 3?56 wt-% NaCl solution shows an improvement in corrosion resistance due to formation of noble nitride. However, presence of brittle nitride phases and related surface roughness seems to deteriorate both tribological and corrosion properties.
Description: Copyright for this paper belongs to Institute of Materials, Minerals and Mining
URI: http://doi.dx.org/10.1179/1743294411Y.0000000061
http://hdl.handle.net/2080/1686
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