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Low-Temperature Plasma Surface Modification of Medical Grade Austenitic Stainless Steel to Combat Wear and Corrosion

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Abstract:

The novel low temperature plasma alloying technique that simultaneously introduces both nitrogen and carbon into the surface of austenitic stainless steel has been used in the past to create a hybrid N-C S-Phase. This S-Phase layer boasts of high hardness and wear resistance without any detriment to corrosion resistance. In this study, the afore mentioned hybrid N-C S-Phase was successfully implemented in the surface of two medical grade austenitic stainless steels: ASTM F138 and F1586. At an optimum process temperature of 430°C a very hard, 20μm precipitate-free S-Phase layer was created. Anodic Polarization tests in Ringer’s solution showed that the corrosion resistance of this layer was similar to that of the untreated alloys. Both dry-wear and corrosion-wear (Ringer’s) behaviour of the surface treated alloys showed an improvement of more than 350% and 40% respectively when compared to the untreated material.

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Periodical:

Key Engineering Materials (Volumes 373-374)

Pages:

296-299

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.373-374.296

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Online since:

March 2008

Authors:

Joseph P. Buhagiar, Han Shan Dong

Keywords:

AISI 316, ASTM F138, ASTM F1586, Austenitic Stainless Steel, Carbo-Nitriding, Carburising, Corrosion, Expanded Austenite, Hybrid, Medical Grade, Nitrocarburising, Ringer Solution, Wear Corrosion

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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