Acta Metallurgica Sinica (English Letters)

, Volume 30, Issue 4, pp 326–332 | Cite as

Corrosion Study of Base Material and Welds of a Ni–Cr–Mo–W Alloy

  • Ajit MishraEmail author


Alloys containing chromium (Cr) and molybdenum (Mo), as the major alloying elements, are widely used in various industries where the material experiences corrosive environments. Chromium (Cr), when added in an optimum amount, forms a Cr2O3 passive film which protects the underlying metal in aggressive solutions. Molybdenum (Mo) forms its oxides in the low pH solutions, thus, enhances the uniform corrosion resistance of an alloy in reducing acids and assists in inhibition to localized corrosion. Minor alloying elements, like tungsten (W) and copper (Cu), also improve the overall corrosion resistance of an alloy in specific solutions. In the present study, corrosion resistance behavior of commercial iron-based alloys (316L SS, 254 SMO and 20Cb3) and nickel-based alloys (Monel 400, Alloy 625 and C-276) was studied in the acidic solutions. While the corrosion behavior of wrought alloys has been widely studied, there is little to no information on the corrosion performance of their welds, typically being the weak regions for corrosion initiation and propagation. Therefore, an attempt was undertaken to investigate the uniform and localized corrosion performance of base metal, simulated heat-affected zone and all-weld-metal samples of a Ni–Cr–Mo–W alloy, C-276. The study was conducted in aggressive acidic solutions. Various corrosion and surface analytical techniques were utilized to analyze the results.


Iron–chromium–molybdenum Nickel–chromium–molybdenum–tungsten All-weld-metal Heat-affected-zone Acids Acidified ferric chloride Potentiodynamic Scanning electron microscopy (SEM) 



The author greatly acknowledges the efforts of Corrosion technician Jeff Dillman and SEM technician John Cotner.


  1. [1]
    J.F. Grubb, T. DeBold, J.D. Fritz, Corrosion of wrought stainless steels. ASM Handb. 13B, 54–77 (2005)Google Scholar
  2. [2]
    P. Crook, N.S. Meck, J. Crum, R.B. Rebak, Corrosion of nickel and nickel—base alloys. ASM Handb. 13B, 228–251 (2005)Google Scholar
  3. [3]
    MTI Publication MS-3, Materials Selector for Hazardous Chemicals, Vol. 3, Hydrochloric Acid, Hydrogen Chloride and Chlorine, eds. C.P. Dillon and W.I. Pollock, (Materials Technology Institute of the Chemical Process Industries, Inc., 1999)Google Scholar
  4. [4]
    MTI Publication MS-1, Materials Selector for Hazardous Chemicals, Sulfuric Acid, ed. C.P. Dillon, (Materials Technology Institute of the Chemical Process Industries, Inc., 1997)Google Scholar
  5. [5]
    W.Z. Friend, Corrosion of nickel and nickel-based alloys (Wiley, New York, 1980), pp. 292–431Google Scholar
  6. [6]
    A. Mishra, Acta Metall. Sin. (Engl. Lett) (2017). doi: 10.1007/s40195-017-0538-y Google Scholar
  7. [7]
    A.K. Mishra, X. Zhang, D.W. Shoesmith, Corrosion 72, 356 (2016)CrossRefGoogle Scholar
  8. [8]
    X. Zhang, D.W. Shoesmith, Corros. Sci. 76, 424 (2013)CrossRefGoogle Scholar
  9. [9]
    X. Zhang, D. Zagidulin, D.W. Shoesmith, Electrochim. Acta 102, 814 (2013)CrossRefGoogle Scholar
  10. [10]
    C. Zhang, Y. Li, Y. Hou, N. Tang, K. Ohmura, Y. Koizumi, A. Chiba, Corros. Sci. 89, 81 (2014)CrossRefGoogle Scholar
  11. [11]
    Y. Li, X. Xu, Y. Hou, C. Zhang, F. Wang, K. Omura, Y. Koizumi, A. Chiba, Corros. Sci. 98, 119 (2015)CrossRefGoogle Scholar
  12. [12]
    Y. Hou, Y. Li, F. Wang, C. Zhang, Y. Koizumi, A. Chiba, Corros. Sci. 99, 185 (2015)CrossRefGoogle Scholar
  13. [13]
    A. Mishra, D.W. Shoesmith, P.E. Manning, Corrosion 73, 68 (2017)CrossRefGoogle Scholar
  14. [14]
    A.K. Mishra, D.W. Shoesmith, Corrosion 70, 721 (2014)CrossRefGoogle Scholar
  15. [15]
    J.R. Hayes, J.J. Gray, A.W. Szmodis, C.A. Orme, Corrosion 62, 491 (2006)CrossRefGoogle Scholar
  16. [16]
    A.C. Lloyd, J.J. Noel, S. McIntyre, D.W. Shoesmith, Electrochim. Acta 49, 3015 (2004)CrossRefGoogle Scholar
  17. [17]
    P. Jakupi, F. Wang, J.J. Noel, D.W. Shoesmith, Corros. Sci. 53, 1670 (2011)CrossRefGoogle Scholar
  18. [18]
    N. Ebrahimi, P. Jakupi, J.J. Noel, D.W. Shoesmith, Corrosion 71, 1441 (2015)CrossRefGoogle Scholar
  19. [19]
    A.K. Mishra, G.S. Frankel, Corrosion 64, 836 (2008)CrossRefGoogle Scholar
  20. [20]
    N. Sridhar, Mater. Perform. 27, 40 (1988)Google Scholar
  21. [21]
    P. Crook, Development of a new Ni–Cr–Mo alloy. Corrosion/1996, Paper No. 412, (NACE, Houston, TX, 1996)Google Scholar
  22. [22]
    P. Crook, M.L. Caruso, D.A. Kingseed, Mater. Perform. 36, 49 (1997)Google Scholar
  23. [23]
    ASTM Annual Book of Standards, Volume 03.02, Wear and Erosion, Metal Corrosion, (West Conshohocken, PA, 2011)Google Scholar
  24. [24]
    M.J. Perricone, J.N. DuPont, M.J. Cieslak, Metall. Mater. Trans. A 34, 1127 (2003)CrossRefGoogle Scholar

Copyright information

© The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Haynes International, Inc.KokomoUSA

Personalised recommendations