The Corrosion Behaviour of Austenitic 316L Stainless Steel After Low-T Plasma Nitridation in the Physiological Solutions

Arslan E., IGDIL M. C., TRABZON L., Kazmanli K., GULMEZ T.

PLASMA PROCESSES AND POLYMERS, vol.4, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 4
  • Publication Date: 2007
  • Doi Number: 10.1002/ppap.200731804
  • Journal Name: PLASMA PROCESSES AND POLYMERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Istanbul Technical University Affiliated: Yes

Abstract

We studied the corrosion properties of low-T plasma-nitrided 316L austenitic stainless steel in the physiological solutions. The plasma nitridation was performed at different gas compositions of N-2-H-2 mixture at temperatures from 400 to 500 degrees C for 1 h. The potentiodynamic anodic polarization measurements were performed in the physiological saline and Hank's solutions at the room temperature. The corrosion resistance is dependent on the microstructure of plasma-nitrided austenitic stainless steel and the chemical composition of physiological solution. The pitting potential tends to increase without CrN precipitation, otherwise the pits are clearly seen on the plasma-nitrided samples. The S-phase formation in the microstructure improves the corrosion resistance.