Effect of High-Temperature Nitriding on the Corrosion Resistance of Ferrite Chromium Steels

Abstract

High-temperature nitriding with subsequent annealing allows changing the structure and increasing the mechanical properties of the entire volume of thin-walled samples from corrosion-resistant high-chromium ferrite steels without the formation of a continuous nitride layer on the surface. At the same time, the influence of high-temperature nitriding on the corrosion resistance of the steels has not been studied. In this paper, a comparative study of the effect of high-temperature nitriding on the electrochemical corrosion resistance and resistance to prolonged high-temperature oxidation of high-chromium ferrite steels with different content of Cr and V (17Cr–1Ti (AISI 439 type), 25Cr–1Ti (AISI 446 type), and Fe–20Cr–5V) has been carried out. High-temperature nitriding of ferrite steel at a temperature of 1075–1100°C with subsequent heat treatment (annealing at 550°C and annealing at 700°C with/without degassing) provides a different content of Cr and V in a solid solution and changes the corrosion resistance of materials. It is ascertained that high-temperature nitriding has a positive effect on the corrosion resistance of the steels in an aqueous solution of 1 mol/L NaCl + 0.5 mol/L H2SO4, and in an aqueous solution of 3% NaCl, the effect is negative. In this case, the degassing of the samples from their surface leads to a sharp displacement of the steady-state corrosion potential toward electropositive values, which indicates an increase in the corrosion resistance of the materials. The steels investigated are characterized by a high resistance to oxidation at high temperature (700°C for 30 h). For Cr20V5 steel in the initial (non-nitrided) state, the specific weight gain is several times greater than for the other steels. Nitriding with annealing both at a temperature of 550°C and at 700°C significantly increases the resistance of Cr20V5 steel to oxidation.

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REFERENCES

  1. 1

    Lakhtin, Yu.M., High-temperature nitriding, Met. Sci. Heat Treat., 1991, vol. 33, nos. 1–2, pp. 124–130.

  2. 2

    Sung, J.H., Kong, J.H., Yoo, D.K., On, H.Y., Lee, D.J., and Lee, H.W., Phase changes of the AISI 430 ferritic stainless steels after high-temperature gas nitriding and tempering heat treatment, Mater. Sci. Eng., A, 2008, vol. 489, pp. 38–43.

    Article  Google Scholar 

  3. 3

    Yoo, D.K., Lee, H.J., Kang, C.Y., Kim, K.H., Kim, Y.H., and Sung, J.H., A study on nitrogen permeation and tempering heat treatment of AISI type 409L ferritic stainless steel, Solid State Phenom., 2006, vol. 118, pp. 149–154.

    CAS  Article  Google Scholar 

  4. 4

    Rogachev, S.O., Nikulin, S.A., Terentiev, V.F., Khatkevich, V.M., Prosvirnin, D.V., and Savicheva, R.O., Effect of internal nitriding on the fatigue strength of ferritic corrosion-resistant steel, Russ. Metall. (Engl. Transl.), 2015, vol. 2015, no. 4, pp. 332–337.

  5. 5

    Nikulin, S.A., Rogachev, S.O., Khatkevich, V.M., and Rozhnov, A.B., Structure and hardness of corrosion resistant ferritic steels subjected to high temperature nitriding, Phys. Met. Metallogr., 2014, vol. 115, no. 2, pp. 186–191.

    Article  Google Scholar 

  6. 6

    Batrakov, V.V., Batrakov, V.P., Pivovarova, L.N., and Sobol’, V.V., Korroziya konstruktsionnykh materialov. Gazy i neorganicheskie kisloty. Kniga 2. Neorganicheskie kisloty (Corrosion of Structural Materials. Gases and Inorganic Acids, Book 2: Inorganic Acids), Moscow: Metallurgiya, 1990.

  7. 7

    Nagai, I.N., Tomashov, N.D., Seledtsov, D.K., and Kochergina, V.M., Corrosion resistance of metallic materials in bromine, Zashch. Met., 1981, vol. 17, no. 5, pp. 530–537.

    CAS  Google Scholar 

  8. 8

    Rogachev, S.O., Nikulin, S.A., and Khatkevich, V.M., Evolution of the structure and mechanical properties of a bulk-nitrided corrosion-resistant ferritic steel upon tempering in the temperature range of 400–700°C, Phys. Met. Metallogr., 2017, vol. 118, no. 8, pp. 782–787.

    CAS  Article  Google Scholar 

  9. 9

    Nikulin, S.A., Khatkevich, V.M., Rogachev, S.O., Denisenko, K.S., and Nechaikina, T.A., Structure and mechanical properties of Fe–Cr–V alloy alloyed with nitrogen from the gas phase by high-temperature nitriding, Fiz. Khim. Obrab. Mater., 2016, no. 2, pp. 52–57.

  10. 10

    Natradze, A.G., Aronson, Yu.P., and Rozanova, Yu.M., Zashchita ot korrozii v khimiko-farmatsevticheskoi promyshlennosti (Corrosion Protection in Chemical-Pharmaceutical Industry), Moscow: Meditsina, 1974.

  11. 11

    Babakov, A.A. and Pridantsev, M.V., Korrozionnostoi-kie stali i splavy (Corrosion-Resistant Steels and Alloys), Moscow: Metallurgiya, 1971.

  12. 12

    Nikulin, S.A., Khatkevich, V.M., Rogachev, S.O., Bekkaliev, B.E., and Belov, V.A., Long-term annealing resistance of ferritic chromium steels subjected to high-temperature nitriding, Russ. Metall. (Engl. Transl.), 2019, vol. 2019, no. 4, pp. 427–430.

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Correspondence to S. O. Rogachev or S. A. Nikulin or V. M. Khatkevich or A. O. Cheretaeva or B. E. Bekkaliev.

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Translated by A. Muravev

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Rogachev, S.O., Nikulin, S.A., Khatkevich, V.M. et al. Effect of High-Temperature Nitriding on the Corrosion Resistance of Ferrite Chromium Steels. Inorg. Mater. Appl. Res. 11, 623–628 (2020). https://doi.org/10.1134/S2075113320030399

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Keywords:

  • ferrite corrosion-resistant steels
  • high-temperature nitriding
  • nitrides
  • electrochemical corrosion
  • high-temperature oxidation