Synergistic effect of Ni and N on improvement of pitting corrosion resistance of high nitrogen stainless steels

Abstract

The pitting corrosion resistance of Fe18Cr10Mn(0·33-0·69)N, Fe18Cr10Mn1Ni(0·33-0·84)N, and Fe18Cr10Mn0·35N(0-3)Ni alloys were investigated. The pitting potential increased as the N content increased in both Fe18Cr10Mn(0·33-0·69)N and Fe18Cr10Mn1Ni(0·33-0·84)N alloys. The rise in the pitting potential was more pronounced in Fe18Cr10Mn1Ni(0·33-0·84)N alloys than in Fe18Cr10Mn(0·33-0·69)N alloys. However, it was found that Ni alone had no effect on the pitting corrosion resistance of Fe18Cr10Mn0·35N based alloys. Thus, it was concluded that the alloyed N worked synergistically with Ni to promote the pitting corrosion resistance in Fe18Cr10Mn based alloys. Analyses of passive films of Fe18Cr10Mn(0·33-0·69)N and Fe18Cr10Mn1Ni(0·33-0·84)N alloys revealed that N was incorporated into the passive film, with N enriched at the film/metal interface. However, the alloyed N increased the Cr cation fraction in passive films of Fe18Cr10Mn1Ni(0·33-0·84)N alloys, whereas N decreased in that of Fe18Cr10Mn(0·33-0·69)N alloys. This difference was considered as the reason for the synergistic effect between N and Ni in Fe18Cr10Mn based alloys.

Keywords

Nitrogen Nickel High nitrogen stainless steel Synergistic effect Pitting corrosion Passive film

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References

Simmons

J. W.

: ‘Overview: high-nitrogen alloying of stainless steels’ Mater. Sci. Eng. A 1996 A207 159–169.

K. H.

Shek

C. H.

and Lai

J. K. L.

: ‘Recent developments in stainless steels’ Mater. Sci. Eng. R 2009 R65 39–104.

Speidel

M. O.

: ‘Nitrogen containing austenitic stainless steels’ Materialwiss. Werkstofftech. 2006 37 875–880.

Levey

P. R.

and van Bennekom

: ‘Mechanistic study of the effects of nitrogen on the corrosion properties of stainless steels’ Corrosion 1995 51 911–921.

Jargelius-Pettersson

R. F. A.

: ‘Electrochemical investigation of the influence of nitrogen alloying on pitting corrosion of austenitic stainless steels’ Corros. Sci. 1999 41, 1639-1664.

Y. C.

Ives

M. B.

and Clayton

C. R.

: ‘Synergism of alloying elements and pitting corrosion resistance of stainless steels’ Corros. Sci. 1993 35 89–96.

Grabke

H. J.

: ‘The role of nitrogen in the corrosion of iron and steels’ ISIJ Int. 1996 36 777–786.

Olefjord

and Wegrelius

: ‘The influence of nitrogen on the passivation of stainless steels’ Corros. Sci. 1996 38, 1203-1220.

H. Y.

Jang

H. J.

Kwon

H. S.

and Kim

S. J.

: ‘Effects of nitrogen on the passivity of Fe–20Cr alloy’ Corros. Sci. 2009 51 48–53.

10.

H.-Y.

and Kwon

H.-S.

: ‘Effects of pH levels on the surface charge and pitting corrosion resistance of Fe’ J. Electrochem. Soc. 2012 159 C416–C421.

11.

Vanini

A. S.

Audouard

J.-P.

and Marcus

: ‘The role of nitrogen in the passivity of austenitic stainless steels’ Corros. Sci. 1994 36, 1825-1834.

12.

Abreu

C. M.

Cristobal

M. J.

Merino

Novoa

X. R.

Pena

and Perez

M. C.

: ‘Electrochemical behaviour of an AISI 304L stainless steel implanted with nitrogen’ Electrochim. Acta 2008 53, 6000-6007.

13.

Willenbruch

R. D.

Clayton

C. R.

Oversluizen

Kim

and Lu

: ‘An XPS and electrochemical study of the influence of molybdenum and nitrogen on the passivity of austenitic stainless steel’ Corros. Sci. 1990 31 179–190.

14.

Han

E.-H.

Yang

and Jiang

: ‘Effects of nitrogen on the passivation of nickel-free high nitrogen and manganese stainless steels in acidic chloride solutions’ Electrochim. Acta 1990 54, 4005-4014.