Corrosion performance of duplex TiN coatings deposited by arc plating
By Rudenja, S.; Kulu, P.; Tallimets, E.; Mikli, V. & Straede, C.A.
Published in Surface and Coatings Technology
NULL
1998
Abstract
Duplex treatment is a relatively new technique to increase wear and corrosion resistance of the steel substrate. As a rule, plasma nitriding increases the wear resistance of the stainless-steel substrate AISI 304, besides it causes more rapid development of corrosive processes. As a result of low-temperature plasma nitriding at a temperature lower than 400 °C, nitrogen is located in a solid solution γN [12], which retains the ability of the substrate to form oxide films. Deposition of TiN coatings onto a pre-nitrided AISI 304 substrate can offer reliable corrosion prevention of the substrate as a result of eliminating local corrosion at the bottom of pinholes and structural defects, which are always presented in hard coatings.
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