Artículos de revistas
A comparative investigation of the corrosion and tribocorrosion behaviour of nitrocarburized, gas nitrided, fluidized-bed nitrided, and plasma nitrided plastic mould steel
Fecha
2018-01-25Registro en:
Surface and Coatings Technology, v. 334, p. 116-123.
0257-8972
10.1016/j.surfcoat.2017.11.033
2-s2.0-85034414205
2-s2.0-85034414205.pdf
Autor
Faculty of Chemistry & Metallurgy
Universidade do Minho
SEMAT/UM
Universidade Estadual Paulista (Unesp)
Tribocorrosion and Nanomedicine
Dept. Eng. Mecânica
Institución
Resumen
The present study aims to compare the corrosion and tribocorrosion behaviour of nitrocarburized, gas-nitrided, fluidized-bed nitrided, and plasma-nitrided Impax Supreme (equivalent to AISI P20) pre-hardened plastic mould steel. Corrosion behaviour was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization in 3.5 wt% NaCl solution. Tribocorrosion tests were performed in the same solution under open circuit potential during sliding against 10 mm alumina balls. Results showed that plasma-nitrided samples presented better corrosion behaviour in terms of tendency to corrosion, corrosion rate, and polarization resistance, as compared to the other studied surface treatments. Together with nitrocarburised samples, plasma-nitrided samples also exhibited lower tendency to corrosion under sliding.