A comparative investigation of the corrosion and tribocorrosion behaviour of nitrocarburized, gas nitrided, fluidized-bed nitrided, and plasma nitrided plastic mould steel

SURFACE & COATINGS TECHNOLOGY

卷:334

Article

Bortepe, E.¹  Alves, A. C.²  Ariza, E.^2,3  Rocha, L. A.^2,4,5  Toptan, F.^2,5,6 

[1] Yildiz Tech Univ, Fac Chem & Met, Dept Met & Mat Engn, Davutpasa Campus, TR-34210 Istanbul, Turkey

[2] Univ Minho, Ctr Microelectromechan Syst, CMEMS UMinho, P-4800058 Guimaraes, Portugal

[3] Univ Minho, SEMAT UM, P-4800058 Guimaraes, Portugal

[4] UNESP Univ Estadual Paulista, Fac Ciencias Bauru, Dept Fis, BR-17033360 Bauru, SP, Brazil

[5] Inst Biomat Tribocorros & Nanomed, Brazilan Branch, IBTN Br, Bauru, SP, Brazil

[6] Univ Minho, Dept Engn Mecan, P-4800058 Guimaraes, Portugal

关键词: Corrosion;    Nitriding;    Nitrocarburising;    Plastic mould steel;    Tribocorrosion;   

DOI  :  10.1016/j.surfcoat.2017.11.033

来源: Elsevier

【 摘 要 】

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, plasmanitrided samples also exhibited lower tendency to corrosion under sliding.

【 授权许可】

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