Corrosion Resistance of AISI 316L Stainless Steel Biomaterial after Plasma Immersion Ion Implantation of Nitrogen

• Published in: Materials Vol. 14; no. 22; p. 6790
• Main Authors: Zatkalíková, Viera, Halanda, Juraj, Vaňa, Dušan, Uhríčik, Milan, Markovičová, Lenka, Štrbák, Milan, Kuchariková, Lenka
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 10-11-2021; MDPI
• Subjects: Austenitic stainless steels; Biomedical materials; Corrosion potential; Corrosion resistance; Corrosion resistant steels; Corrosion tests; Electrochemical impedance spectroscopy; Electrodes; Electrolytes; Immersion tests (corrosion); Ion implantation; Low temperature; Mechanical properties; Nitrogen; Nitrogen plasma; Plasma; Spectrum analysis; Stainless steel; Surgical implants; Tribology; France; Slovakia
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma14226790

Plasma immersion ion implantation (PIII) of nitrogen is low-temperature surface technology which enables the improvement of tribological properties without a deterioration of the corrosion behavior of austenitic stainless steels. In this paper the corrosion properties of PIII-treated AISI 316L stainless steel surfaces are evaluated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP) and exposure immersion tests (all carried out in the 0.9 wt. % NaCl solution at 37 ± 0.5 °C) and compared with a non-treated surface. Results of the three performed independent corrosion tests consistently confirmed a significant increase in the corrosion resistance after two doses of PIII nitriding.