Behavior of Bare, Cr3C2-20NiCr, and NiCrAlY coated Fe-Ni Based Superalloy Under Hot Corrosion in a 75 wt.% Na2SO4 + 25wt.% NaCl film at 9000C

  • Selly Septianissa Department of Mechanical Engineering, Faculty of Engineering, Widyatama University, Bandung 40125, Indonesia
  • Ayu Zahra Chandrasari Department of Mechanical Engineering, Faculty of Engineering, Widyatama University, Bandung 40125, Indonesia
Keywords: Superalloy, thermal spray coating, HVOF, NiCrAlY; Cr3C2-20 NiCr, hot corrosion.

Abstract

 

The main aim of this research is to assess the resistance to hot corrosion of untreated Fe-Ni-based superalloys compared to those coated with Cr3C2-20NiCr and NiCrAlY. These superalloys are strengthened through precipitation with ɣ’ Ni3(Al, Ti) and further fortified using high-velocity oxy-fuel (HVOF) thermal spray coating. The evaluation is performed under harsh conditions consisting at a temperature of 900°C for a duration of 25 cycles in a mixture containing 75 wt.% Na2SO4 and 25 wt.% NaCl. An optical microscope (OM) is utilized to determine the coating thickness of the coated specimens. Corrosion kinetics are evaluated by measuring changes in mass at the conclusion of each cycle during the investigation of hot corrosion. Furthermore, X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM) are employed to investigate the chemical composition, ascertain phases, and scrutinize the surface morphology of the corrosion products. The findings reveal that the Fe-Ni superalloy, coated with precipitation-strengthened layers, demonstrates enhanced resistance to hot corrosion compared to the uncoated substrates, as evidenced by reduced weight gain per unit area. The coated substrates are enveloped by protective oxide layers consisting of chromium, nickel, aluminum, and their respective spinels, effectively shielding the substrate surfaces. In contrast, The superalloy without coating, which underwent precipitation hardening within the substrate, showed instances of microspalling and sputtering of the oxide scale. Findings suggested that both Cr3C2-20NiCr and NiCrAlY coatings substantially improved resistance against hot corrosion. Noteworthy was the superior protective efficacy of the NiCrAlY coating over the Cr3C2-20NiCr layer, attributed to the development of protective oxide scales containing Cr2O3 and NiCr2O4.

References

Chen, S., Zhao, M., & Rong, L. (2013). Effect of Ti content on the microstructure and mechanical properties of electron beam welds in Fe–Ni based alloys. Materials Science and Engineering: A, 571, 33-37.

Mustafa, A. H., Hashmi, M. S., Yilbas, B. S., & Sunar, M. (2008). Investigation into thermal stresses in gas turbine transition-piece: Influence of material properties on stress levels. Journal of Materials Processing Technology, 201(1-3), 369-373.

Muthu, S. M., Arivarasu, M., Krishna, T. H., Ganguly, S., Prabhakar, K. P., & Mohanty, S. (2020). Improvement in hot corrosion resistance of dissimilar alloy 825 and AISI 321 CO 2-laser weldment by HVOF coating in aggressive salt environment at 900 C. International Journal of Minerals, Metallurgy and Materials, 27, 1536-1550.

Mustafa, A. H., Hashmi, M. S., Yilbas, B. S., & Sunar, M. (2008). Investigation into thermal stresses in gas turbine transition-piece: Influence of material properties on stress levels. Journal of Materials Processing Technology, 201(1-3), 369-373.

Singhal, L. K., & Martin, J. W. (1968). The mechanism of tensile yield in an age-hardened steel containing γ′(ordered Ni3Ti) precipitates. Acta Metallurgica, 16(7), 947-953.

Thompson, A. W., & Brooks, J. A. (1982). The mechanism of precipitation strengthening in an iron-base superalloy. Acta Metallurgica, 30(12), 2197-2203.

Zhang, P., Zhu, Q., Hu, C., Wang, C. J., Chen, G., & Qin, H. Y. (2015). Cyclic deformation behavior of a nickel-base superalloy under fatigue loading. Materials & Design, 69, 12-21.

Martín, Ó., De Tiedra, P., & San-Juan, M. (2017). Combined effect of resistance spot welding and precipitation hardening on tensile shear load bearing capacity of A286 superalloy. Materials Science and Engineering: A, 688, 309-314.

Muthu, S. M., & Arivarasu, M. (2019). Oxidation and hot corrosion studies on Fe-based superalloy A-286 pulsed current GTA weldments in gas turbine environment. Materials Research Express, 6(11), 116577.

Sidhu, T. S., Agrawal, R. D., & Prakash, S. (2005). Hot corrosion of some superalloys and role of high-velocity oxy-fuel spray coatings—a review. Surface and coatings technology, 198(1-3), 441-446.

Singh, J., Vasudev, H., & Singh, S. (2020). Performance of different coating materials against high temperature oxidation in boiler tubes–A review. Materials Today: Proceedings, 26, 972-978.

Reddy, N. C., Koppad, P. G., Reddappa, H. N., Ramesh, M. R., Babu, E. R., & Varol, T. E. M. E. L. (2019). Hot corrosion behaviour of HVOF sprayed Ni3Ti and Ni3Ti+(Cr3C2+ 20NiCr) coatings in presence of Na2SO4-40% V2O5 at 650° C. Surface Topography: Metrology and Properties, 7(2), 025019.

Singh, H., Puri, D., & Prakash, S. (2007). An overview of Na 2 SO 4 and/or V 2 O 5 induced hot corrosion of Fe-and Ni-based superalloys. Rev. Adv. Mater. Sci, 16(1-2), 27-50.

Zhang, Y. J., Sun, X. F., Guan, H. R., & Hu, Z. Q. (2002). 1050 C isothermal oxidation behavior of detonation gun sprayed NiCrAlY coating. Surface and Coatings Technology, 161(2-3), 302-305.

Sidhu, B. S., & Prakash, S. (2006). Performance of NiCrAlY, Ni–Cr, Stellite-6 and Ni3Al coatings in Na2SO4–60% V2O5 environment at 900 C under cyclic conditions. Surface and Coatings Technology, 201(3-4), 1643-1654.

Sidhu, T. S., Prakash, S., & Agrawal, R. D. (2006). Evaluation of hot corrosion resistance of HVOF coatings on a Ni-based superalloy in molten salt environment. Materials science and engineering: A, 430(1-2), 64-78.

Goyal, K., & Goyal, R. (2020). Improving hot corrosion resistance of Cr3C2–20NiCr coatings with CNT reinforcements. Surface engineering, 36(11), 1200-1209.

Wang, J., Chen, M., Cheng, Y., Yang, L., Bao, Z., Liu, L., ... & Wang, F. (2017). Hot corrosion of arc ion plating NiCrAlY and sputtered nanocrystalline coatings on a nickel-based single-crystal superalloy. Corrosion Science, 123, 27-39.

Ren, X., & Wang, F. (2006). High-temperature oxidation and hot-corrosion behavior of a sputtered NiCrAlY coating with and without aluminizing. Surface and Coatings Technology, 201(1-2), 30-37.

Septianissa, S., Prawara, B., Basuki, E. A., Martides, E., & Riyanto, E. (2022). Improving the hot corrosion resistance of γ/γ’in Fe-Ni superalloy coated with Cr3C2-20NiCr and NiCrAlY using HVOF thermal spray coating. International Journal of Electrochemical Science, 17(12), 221231.

Wang, H., Yan, X., Zhang, H., Gee, M., Zhao, C., Liu, X., & Song, X. (2019). Oxidation-dominated wear behaviors of carbide-based cermets: A comparison between WC-WB-Co and Cr3C2-NiCr coatings. Ceramics International, 45(17), 21293-21307.

Kamal, S., Jayaganthan, R., Prakash, S., & Kumar, S. (2008). Hot corrosion behavior of detonation gun sprayed Cr3C2–NiCr coatings on Ni and Fe-based superalloys in Na2SO4–60% V2O5 environment at 900 C. Journal of alloys and compounds, 463(1-2), 358-372.

Papp, J., Hehemann, R. F., & Troiano, A. R. (1974). Hydrogen embrittlement of high strength fcc alloys. Hydrogen in metals, 1974.

Nithin, H. S., Nishchitha, K. M., Shamanth, V., Hemanth, K., & Babu, K. A. (2020). High-Temperature Oxidation and Corrosion Behaviour of APS CoCrAlY+ Cr 3 C 2–NiCr Composite Coating. Journal of Bio-and Tribo-Corrosion, 6(2), 28.

Guo, M. H., Wang, Q. M., Ke, P. L., Gong, J., Sun, C., Huang, R. F., & Wen, L. S. (2006). The preparation and hot corrosion resistance of gradient NiCoCrAlYSiB coatings. Surface and Coatings Technology, 200(12-13), 3942-3949.

McKee, D. W., Shores, D. A., & Luthra, K. L. (1978). The effect of SO 2 and NaCl on high temperature hot corrosion. Journal of the Electrochemical Society, 125(3), 411.

Chen, Lingyun, Hao Lan, Chuanbing Huang, Bin Yang, Lingzhong Du, and Weigang Zhang. "Hot corrosion behavior of porous nickel-based alloys containing molybdenum in the presence of NaCl at 750° C." Engineering Failure Analysis 79 (2017): 245-252.

Nicoll, A. R., & Wahl, G. (1982). The effect of alloying additions on MCrAlY systems—An experimental study. Thin Solid Films, 95(1), 21-34.

Published
2024-05-29
How to Cite
Septianissa, S., & Chandrasari, A. Z. (2024). Behavior of Bare, Cr3C2-20NiCr, and NiCrAlY coated Fe-Ni Based Superalloy Under Hot Corrosion in a 75 wt.% Na2SO4 + 25wt.% NaCl film at 9000C. International Journal of Science and Society, 6(2), 507-517. Retrieved from http://ijsoc.goacademica.com/index.php/ijsoc/article/view/1170