High-temperature oxidation-resistant NiCr/Al duplex coating on carbon steel substrate

Ly Quoc Cuong, Nguyen Van Tuan, Pham Thi Ha, Pham Thi Ly, Vo An Quan, Dao Bich Thuy, Nguyen Tuan Anh, Le Thu Quy
Author affiliations

Authors

  • Ly Quoc Cuong Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Nguyen Van Tuan Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Pham Thi Ha Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Pham Thi Ly Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Vo An Quan Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Dao Bich Thuy Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Nguyen Tuan Anh Institute for Tropical Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
  • Le Thu Quy National Key Laboratory for Welding and Surface Treatment Technologies, NARIME 4 Pham Van Dong Road, Cau Giay District, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/58/1/13483

Keywords:

Thermal spray, combined coating, NiCr/Al alloy coating, oxidation resistance

Abstract

The oxidation resistance property of NiCr/Al duplex coating system has been evaluated at 800oC during retention times of 1.5; 3; 4.5 and 6 hours. After the oxidation test, SEM-EDS data indicated the diffusion of aluminum into the NiCr coating, whereas  XRD patterns revealed the appearance of new phases (Al3Ni2, Al2O3). In addition, an increase in micro-hardness (up to 518 - 842 Hv) was obtained after oxidation test. These obtained findings indicated that NiCr/Al coating had higher oxidation resistance than NiCr coating.

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References

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Published

21-02-2020

How to Cite

[1]
L. Q. Cuong, “High-temperature oxidation-resistant NiCr/Al duplex coating on carbon steel substrate”, Vietnam J. Sci. Technol., vol. 58, no. 1, pp. 21–30, Feb. 2020.

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Section

Materials