Open access


Reliability and durability assurance poses a serious challenge for surgical instruments manufacturers. Hard working conditions, such as intermittent contact with body fluids and hard bone tissues, as well as necessity to undergo frequent sterilisation processes, induce constant research into solutions capable of ensuring high wear resistance while maintaining satisfactory imperviousness to corrosion. Plasma nitriding is marked as the modern corrosion resistance improving method suitable for surgical instruments steels. The paper presents findings from the heat treated and plasma nitrided AISI 440B (PN EN or DIN X90CrMoV18) steel corrosion resistance studies. Three conventionally heat treated (quenched with tempering in 250, 390 or 605°C) and three additionally plasma nitrided in N2:H2 reaction gas mixture (50:50, 35:65 and 20:80 ratio, respectively) specimens groups were examined. Furthermore, the authors evaluated the effect of machining - polishing and sandblasting - on investigated steel corrosion resistance. Microscopic observations and electrochemical corrosion tests were performed using a variety of analytical techniques. Results showed that, in comparison to conventional heat treatment, plasma nitriding of 440B stainless steel does not significantly affect its corrosive characteristics as far as the uniform nitride layer over the entire detail surface is obtained. The layer heterogeneity results in intensification of corrosion processes, making the material even more susceptible to corrosion than after conventional heat treatment, and contributing to severe, visible even with the unaided eye damages development.

1. Baszkiewicz J., Kamiński F. (2006), Materials corrosion, Publishing Office of Warsaw University of Technology, Warszawa.

2. Bell T., Sun Y. (2002), Low temperature plasma nitriding and carburising of austenitic stainless steels, Advanced Materials And Processes, Vol. 160, No. 6, 49-51.

3. Głowacka M. (1996), Metallography, Publishers of Gdansk Technical University, Gdansk.

4. Gösta W. (1985), Base of corrosion and metals protection, WNT, Warszawa.

5. Grubb J. F. (2011), Martensitic stainless steels in Uhlig's Corrosion Handbook (by Revie R. W.) , John Wiley and Sons, Hoboken.

6. Hedström P. (2007), Deformation and Martensitic Phase Transformation in Stainless Steels, Lulea University of Technology, Lulea.

7. Li C. X, Bell T. (2006), Corrosion properties of plasma nitrided AISI 410 martensitic stainless steel in 3.5% NaCl and 1% HCl aqueous solutions, Corrosion Science, Vol. 48, No. 8, 2035-2049.

8. Marciniak J. (1992), Biomaterials in bone surgery, Publishers of Silesian University of Technology, Gliwice.

9. Mingolo N., Tschiptschin A. P., Pinedo C. E. (2006), On the formation of expanded austenite during plasma nitriding of an AISI 316L austenitic stainless steel, Surface and Coatings Technology, Vol. 201, No. 7, 4215-4218.

10. Paszenda Z., Tyrlik-Held, J. (2003), Surgical instrument, Publishers of Silesian University of Technology, Gliwice.

11. Pinedo C. E., Monteiro W. A. (2004), On the kinetics of plasma nitriding a martensitic stainless steel type AISI 420, Surface and Coatings Technology, Vol. 179, No. 2-3, 119-123.

12. Rudnik S. (2006), Metallography, PWN, Warszawa.

13. Samandi M., Shedden B. A., Smith D. I., Collins G. A., Hutchings R., Tendys J. (1993), Microstructure, corrosion and tribological behaviour of plasma immersion ion-implanted austenitic stainless steel,Surface and Coatings Technology, Vol. 59, No. 1-3, 261-266.

14. Tuckart W., Forlerer E., Iurman L. (2007), Delayed cracking in plasma nitriding of AISI 420 stainless steel, Surface & Coatings Technology, Vol. 202, No. 1, 199-202.

15. Wu K., Liu G. Q., Wang L., Xu B. F.(2010) Research on new rapid and deep plasma nitriding techniques of AISI 420 martensitic stainless steel, Vacuum, Vol. 84, No.6, 870-875.

16. Xi Y., Liu D., Han D. (2008a), Improvement of corrosion and wear resistances of AISI 420 martensitic stainless steel using plasma nitriding at low temperature, Surface & Coatings Technology, Vol. 202, No. 12, 2577-2583.

17. Xi Y., Liu D., Han D. (2008b) Improvement of erosion and erosion- corrosion resistance of AISI420 stainless steel by low temperature plasma nitriding, Applied Surface Science, Vol. 254, No. 18, 5953-5958.

18. Yang S., Wang Z. J., Kokawa H., Yutaka S. S. (2007). Grain boundary engineering of 304 austenitic stainless steel by laser surface melting and annealing, Journal of Materials Science, Vol. 42, No. 3, 847-853.

19. PN-EN ISO 7153-1:2002 Surgical instruments. Metallic materials. Stainless steel.

20. PN-EN ISO 8044:2002 Corrosion of metals and alloys - Basic terms and definitions.

21. PN-EN 10088-1:2005 Stainless steels. List of stainless steels.

Acta Mechanica et Automatica

The Journal of Bialystok Technical University

Journal Information

CiteScore 2017: 1.07

SCImago Journal Rank (SJR) 2017: 0.361
Source Normalized Impact per Paper (SNIP) 2017: 0.917


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 75 75 10
PDF Downloads 32 32 7