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Journal of Materials Science

, Volume 30, Issue 20, pp 5313–5320 | Cite as

Passivity breakdown due to discontinuous precipitation during ageing of 21Cr-10Mn-5Ni stainless steel

  • I. Chattoraj
  • S. K. Das
  • S. Jana
  • S. P. Chakraborty
  • A. K. Bhattamishra
Article

Abstract

Discontinuous precipitation in a 21Cr-10Mn-5Ni steel was found to result in breakdown of passivity when tested in a 0.5 m H2SO4 + 0.01 m KSCN solution. The electrochemical response was similar to that due to sensitization of conventional stainless steels. The ageing time and temperature affected the resistance of the passive film, with lower ageing temperatures being more severe in terms of passivity breakdown. The effect of interlamellar spacing on the chromium depletion, the effect of volume diffusion on the healing of the matrix, and the solubility product reaction for precipitation, were considered to explain the observed different strengths of passive films formed on specimens aged at different temperatures and times. The observance of good corrosion protection in spite of the presence of profuse precipitates was in contrast to the effect of grain-boundary carbide proliferation on the corrosion resistance of conventional stainless steels.

Keywords

Carbide Corrosion Resistance Ageing Time Passive Film Ageing Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    D. B. Williams and E. P. Butler, Int. Met. Rev. 3 (1981) 153.Google Scholar
  2. 2.
    R. O. Williams, Trans AIME 215 (1959) 1026.Google Scholar
  3. 3.
    M. Korchynsky and R. W. Fountain, ibid. 215 (1959) 1033.Google Scholar
  4. 4.
    R. B. Scarlin, Scripta Metall. 10 (1976) 711.CrossRefGoogle Scholar
  5. 5.
    S. I. Nissan, Y. Komen and B. Z. Weiss, Acta Metall. 23 (1975) 1313.CrossRefGoogle Scholar
  6. 6.
    E. L. Raymond, Corrosion 24 (1968) 180.CrossRefGoogle Scholar
  7. 7.
    R. Chait and P. Lum, ibid. 32 (1976) 450.CrossRefGoogle Scholar
  8. 8.
    B. R. Nijhawan, P. K. Gupte, S. S. Bhatnagar, B. K. Guha and S. S. Dhanjal, J. Iron Steel Inst. 205 (1967) 292.Google Scholar
  9. 9.
    G. Henry and J. Plateau, NML Tech. J. 5 May (1963) 25.Google Scholar
  10. 10.
    C. Stawstrom and M. Hillert, J. Iron Steel Inst. 207 (1969) 77.Google Scholar
  11. 11.
    E. L. Hall and C. L. Briant, Metall. Trans. 15A (1984) 792.Google Scholar
  12. 12.
    G. S. Was and R. M. Kruger, Acta Metall. 33 (1985) 841.CrossRefGoogle Scholar
  13. 13.
    S. M. Bruemmer, L. A. Charlot and B. W. Arey, Corrosion 44 (1988) 328.CrossRefGoogle Scholar
  14. 14.
    T. M. Devine, J. Electrochem. Soc. 126 (1979) 374.CrossRefGoogle Scholar
  15. 15.
    M. Hillert and R. Lagneborg, J. Mater. Sci. 6 (1971) 208.CrossRefGoogle Scholar
  16. 16.
    R. G. Faulkner, Mater. Sci. Technol. 9 (1993) 118.CrossRefGoogle Scholar
  17. 17.
    C. Hsiao and E. J. Dulis, Trans. ASM 49 (1957) 655.Google Scholar
  18. 18.
    A. J. Sedriks, Corrosion 45 (1989) 510.CrossRefGoogle Scholar
  19. 19.
    A. M. Ritter and M. F. Henry, Metall. Trans. 16A (1985) 1759.CrossRefGoogle Scholar
  20. 20.
    K. N. Tu and D. Turnbull, Acta Metall. 15 (1967) 369.CrossRefGoogle Scholar
  21. 21.
    R. A. Fournelle and J. B. Clark, Metall Trans. 3 (1972) 2757.CrossRefGoogle Scholar
  22. 22.
    E. Hornbogen, ibid. 3 (1972) 2717.CrossRefGoogle Scholar
  23. 23.
    D. A. Porter and J. W. Edington, Proc. R. Soc. A358 (1977) 335.Google Scholar
  24. 24.
    W. L. Clark, V. M. Romero and J. C. Danko, “Corrosion/77”, paper 180 (NACE, Houston, TX, 1977).Google Scholar
  25. 25.
    A. P. Majidi and M. A. Streicher, Corrosion 40 (1984) 584.CrossRefGoogle Scholar
  26. 26.
    T. A. Mozhi, W. A. T. Clark, K. Nishimoto, W. B. Johnson and D. D. MacDonald, ibid. 41 (1985) 555.CrossRefGoogle Scholar
  27. 27.
    M. N. Thompson, PhD thesis, Univeristy of Cambridge (1971).Google Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • I. Chattoraj
    • 1
  • S. K. Das
    • 2
  • S. Jana
    • 1
  • S. P. Chakraborty
    • 2
  • A. K. Bhattamishra
    • 1
  1. 1.CRP DivisionNational Metallurgical LaboratoryJamshedpurIndia
  2. 2.MTP DivisionNational Metallurgical LaboratoryJamshedpurIndia

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