CORROSION RESISTANCE OF AUSTENITIC STAINLESS STEELS WITHOUT NITROGEN AND NITROGEN-ALLOYED IN OXIDIZING AND CHLORIDE ENVIRONMENT
DOI:
https://doi.org/10.14529/met200305Keywords:
nitrogen, austenitic steel, corrosion resistance, intergranular corrosion, nitric acid, stress corrosion, chloridesAbstract
The corrosion resistance of the developed austenitic steel 03Cr20Ni9Mn3N0.30, alloyed with nitrogen in comparison with steel 03Cr18Ni11 (AISI 304L) was studied. The analysis of corrosion resistance to intergranular corrosion in 65 % boiling nitric acid was carried out according to the “DU method” of GOST 6032–2017. The studied steels resistance in 42% boiling MgCl2 solution was also evaluated. It has been established, that the corrosion rate in 65 % boiling nitric acid for steel AISI 304L and nitrogen-alloyed is comparable and amounts to about 0.2-0.4 mm / year. However, it was shown that the incubation period to achieve a sensitization state in steel 03Cr20Ni9Mn3N0.30 is about 4 times longer than of steel AISI 304L. Additionally, the conditions for the studied steels resistance to intergranular corrosion in boiling 65 % nitric acid after heating at temperatures from 500 to 850 °C and holdings from 1 hour to 100 hours are determined. Based on the test results, a Rollason diagram was constructed. The microalloying effect with boron and rare-earth metals on 03Cr20Ni9Mn3N0.30 corrosion resistance (according to the DU method of GOST 6032-2017) was also investigated. The permissible concentrations of microalloying elements (boron up to 0.0025 wt. %, and rare-earth metals up to 0.04 wt. %) are determined, which provide high technological plasticity without reducing its corrosion resistance. When tested by the DU method, the corrosion metal loss in both of these cases was not more than 0.35 mm/year. However, with the boron introduction in an amount of 0.01 wt. %, the corrosion rate increases sharply to 1.328 mm/year, while reducing technological plasticity. As a result of compared steels testing samples for stress corrosion in a 42 % boiling MgCl2 solution. The superiority of 03Cr20Ni9Mn3N0.30 steel over AISI 304L steel at a strain of 280 MPa was more than 8 times higher, and at a strain of 100 MPa almost 10 times higher. It should be noted that the failure nature of steel 03Cr20Ni9Mn3N0.30 and AISI 304L is identical, but the time required for cracks initiation by almost differs.References
Singh V.B., Singh V.K. Corrosion behaviour of stainless steel (AISI 321) in alcoholic-H2SO4 mixtures. Materials Transaction, 1991, vol. 32, no. 3, pp. 251–256. DOI: 10.2320/matertrans1989.32.251
Finšgar M., Milošev I. Corrosion behaviour of stainless steels in aqueous solutions of methanesulfonic acid. Corrosion Science, 2010, vol. 52, no. 37, pp. 2430–2438. DOI: 10.1016/j.corsci.2010.04.001
Alekseev A.B. et al. Corrosion resistance of austenitic steels and alloys in high temperature water. Journal of Nuclear Materials, 1996, vol. 233, pp. 1367–1371. DOI: 10.1016/S0022-3115(96)00065-7
Shen Z. et al. SCC susceptibility of type 316Ti stainless steel in supercritical water. Journal of Nuclear Materials, 2015, vol. 458, pp. 206–215. DOI: 10.1016/j.jnucmat.2014.12.014 5. Gavriljuk V., Berns H. High Nitrogen Steels. Berlin, Springer, 1999, 378 p.
Li H.B. et al. Investigation of microbiologically influenced corrosion of high nitrogen nickel-free stainless steel by Pseudomonas aeruginosa. Corrosion Science, 2016, vol. 111, pp. 811–821. DOI: 10.1016/j.corsci.2016.06.017
Li H.B. et al. Microstructure, mechanical and corrosion properties of friction stir welded high nitrogen nickel-free austenitic stainless steel. Materials and Design, 2015, vol. 84, pp. 291–299. DOI: 10.1016/j.matdes.2015.06.103
Matsunaga H. et al. Effect of nitrogen on corrosion of duplex stainless steel weld metal. Science and Technology of Welding and Joining, 1998, vol. 3, pp. 225–232. DOI: 10.1179/stw.1998.3.5.225
Li H. et al. Microstructure evolution and mechanical properties of friction stir welding superaustenitic stainless steel S32654. Materials and Design, 2017, vol. 118, pp. 207–217. DOI: 10.1016/j.matdes.2017.01.034
Fu Y. et al. Effects of nitrogen on the passivation of nickel-free high nitrogen and manganese stainless steels in acidic chloride solutions. Electrochimica Acta, 2009, vol. 54, pp. 4005–4014. DOI: 10.1016/j.electacta.2009.02.024
Jargelius-Pettersson R.F.A. Electrochemical investigation of the influence of nitrogen alloying on pitting corrosion of austenitic stainless steels. Corrosion Science, 1999, vol. 41, pp. 1639–1664. DOI: 10.1016/S0010-938X(99)00013-X
Lee J.B., Yoon S.I. Effect of nitrogen alloying on the semiconducting properties of passive films and metastable pitting susceptibility of 316L and 316LN stainless steels. Materials Chemistry and Physics, 2010, vol. 122, pp. 194–199. DOI: 10.1016/j.matchemphys.2010.02.033
Lei M.K., Zhu X.M. Role of nitrogen in pitting corrosion resistance of a high-nitrogen facecenteredcubic phase formed on austenitic stainless steel. Journal of Electrochemical Society, 2005, vol. 152, pp. B291–B295. DOI: 10.1149/1.1939245
Ningshen S. et al. Semiconducting and passive film properties of nitrogen-containing type 316LN stainless steels. Corrosion Science, 2007, vol. 49, pp. 481–496. DOI: 10.1016/j.corsci.2006.05.041
Ha H.Y., Lee T.H., Kim S.J. Role of nitrogen in the active-passive transition behavior of binary Fe-Cr alloy system. Electrochimica Acta, 2012, vol. 80, pp. 432–439. DOI: 10.1016/j.electacta.2012.07.056 16. Ha H.Y. et al. Effects of nitrogen on the passivity of Fe-20Cr alloy. Corrosion Science, 2009, vol. 51, pp. 48–53. DOI: 10.1016/j.corsci.2008.10.017
Li H.B. et al. Zhang Pitting corrosion and crevice corrosion behaviors of high nitrogen austenitic stainless steels. International Journal of Minerals, Metallurgy and Materials, 2009, vol. 16, pp. 517–524. DOI: 10.1016/S1674-4799(09)60090-X
Lothongkum G. et al. Effect of nitrogen on corrosion behavior of 28Cr-7Ni duplex and microduplex stainless steels in air-saturated 3.5 wt% NaCl solution. Corrosion Science, 2006, vol. 48, pp. 137–153. DOI: 10.1016/j.corsci.2004.11.017
Olsson C.O.A. The influence of nitrogen and molybdenum on passive films formed on the austenoferritic stainless steel 2205 studied by AES and XPS. Corrosion Science, 1995, vol. 37, pp. 467–479. DOI: 10.1016/0010-938X(94)00148-Y
Oldfield, J.W. Crevice Corrosion Resistance of Commercial and High-Purity Experimental Stainless Steels in Marine Environments – The Influence of N, Mn, and S. Corrosion, 1990, 46 (7), pp. 574–581. DOI: 10.5006/1.3585151
Rondelli G., Vicentini B., Cigada A. Influence of nitrogen and manganese on localized Corrosion behaviour of stainless steels in chloride environments. Materials and Corrosion, 1995, vol. 46, p. 628. DOI: 10.1002/maco.19950461104.
Janik-Czachor M., Szummer A. Corrosion-Resistant Low Manganese Stainless Steels. Corrosion Reviews, 1993, vol. 11, no. 3-4, pp. 117–144.
Klapper H.S., Stevens J. Influence of Alloying Elements on the Pitting Corrosion Resistance of CrMn-Stainless Steels in Simulated Drilling Environments. NACE – International Corrosion Conference Series, 2015.
Speidel М.О. Nitrogen Containing Austenitic Stainless Steels. Mat.-wiss. u. Werkstoiftech, 2006, vol. 37, no. 10, pp. 875–880.
Шабалов И.П., Шлямнев А.П., Щукина Л.Е. Структура, механические свойства и коррозионная стойкость нержавеющих сталей с азотом. Проблемы черной металлургии и материаловедения. 2016. № 1. С. 41–47. [Shabalov I.P., Shlyamnev A.P., Shchukina L.E. Structure, mechanical properties and corrosion resistance of stainless steels alloyed with nitrogen. Problems of Ferrous Metallurgy and Materials Science, 2016, no. 1, pp. 41–47. (in Russ.)]
Мазничевский А.Н., Гойхенберг Ю.Н., Сприкут Р.В. Влияние кремния и микролегирующих элементов на коррозионную стойкость аустенитной стали. Вестник ЮУрГУ. Серия «Металлургия». 2019. Т. 19, № 2. С. 14–24. [Maznichevsky A.N., Goikhenberg Yu.N., Sprikut R.V. Influence of Silicon and Microalloying Elements on the Corrosion Resistance of Austenitic Steel. Bulletin of the South Ural State University. Ser. Metallurgy, 2019, vol. 19, no. 2, pp. 14–24. (in Russ.)] DOI: 10.14529/met190202
Мазничевский А.Н., Гойхенберг Ю.Н., Сприкут Р.В., Савушкина Е.С. Влияние азота на механические свойства и технологическую пластичность аустенитной стали. Вестник ЮУрГУ. Серия «Металлургия». 2019. Т. 19, № 2. С. 25–35. [Maznichevsky A.N., Goikhenberg Yu.N., Sprikut R.V., Savushkina E.S. Influence of Nitrogen on Mechanical Properties and Technological Plasticity of Austenitic Steel. Bulletin of the South Ural State University. Ser. Metallurgy, 2019, vol. 19, no. 2, pp. 25–35. (in Russ.)] DOI: 10.14529/met190203
