Tribological and corrosive influence of graphite in thermally sprayed Cr3C2/NiCr coatings
Authors: Prof. Dr.-Ing. Kirsten Bobzin, Dr.-Ing. Wolfgang Wietheger, M. Sc. Elisa Olesch, M. Sc. Marvin Schulz
For the protection against corro-sion and wear, Cr3C2/NiCr coatings have been established in various ap-plications. Solid lubricants can be used to improve the wear behavior of these coatings. In this study, the influence of graphite in a thermally sprayed Cr3C2/NiCr coating is investigated. A pin-on-disc test is used to analyse the influence of graph-ite on the wear behavior. Polariza-tion tests were conducted to investigate the corrosion behavior in a 5% NaCl solution. The results demon-strate that the integration of graph-ite can reduce wear by an amount of up to 84% compared to a thermally sprayed Cr3C2/NiCr coating. However, the corrosion behavior is favored by the increase of electrolyte paths and additional corrosion elements in the coating.
Pages: 112 - 119
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