Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지

High Temperature Oxidation and Sulfidation of Ni-15at.%W Coatings

  • Kim Chanwou (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • You Teayoul (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Shapovalov Yuriy (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Ko Jaehwang (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Lee Dongbok (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Lee Kyuhwan (Surface Engineering Department, Korea Institute of Machinery and Materials(KIMM)) ;
  • Chang Doyon (Surface Engineering Department, Korea Institute of Machinery and Materials(KIMM)) ;
  • Kim Dongsoo (Surface Engineering Department, Korea Institute of Machinery and Materials(KIMM)) ;
  • Kwon Sikchol (Surface Engineering Department, Korea Institute of Machinery and Materials(KIMM))
  • Published : 2005.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Ni-15at.% W coatings with film thicknesses of 20-40 ㎛ were electroplated on a steel substrate, and their oxidation behavior was investigated at 700 and 800℃ in air. For comparison, a pure Ni coating and a bulk Ni were also oxidized. The Ni-15at.%W coating displayed the worst oxidation resistance, due to the formation of less-protective NiO, Fe₂O₃, NiFe₂O₄ and NiWO₄. The corrosion behavior Ni-15at.%W coatings electroplated on a steel substrate was similarly investigated at 700 and 800℃ in the Ar-l%SO₂ atmosphere. For comparison, the uncoated steel substrate was also corrosion-tested in the Ar-l %SO₂ atmosphere. Severe scale spallation and the internal corrosion of the steel that occurred in the uncoated substrate were not observed in the coated specimen. However, it seemed that the Ni-15at.%W coating cannot be a potential candidate as a sulfidation-resistant coating, due to the formation of less-protective NiO, NiS, WO₃ and NiWO₄.

Keywords

References

  1. L. I. Stepanova, O. G. Purovskaya, Metal Finishing, 44 (1998) 50
  2. T. Yamasaki, R. Tomohira, Y Ogino, P. Schlobmacher, K. Enrlich, Plating Surf. Finish. 87 (2000) 148
  3. T. Yamasaki, P. Schlobmacher, K. Enrlich, Y Ogino, NanoStructured Materials, 10, (1998) 375 https://doi.org/10.1016/S0965-9773(98)00078-6
  4. T. Omi, M. Nakamura, H. Yamamoto, J. Surf. Finishing Soc. Japan, 39 (1988) 809 https://doi.org/10.4139/sfj1950.39.809
  5. M. Donten, H. Cesiulis, Z. Stojek, Electrochim. Acta, 45 (2000) 3389 https://doi.org/10.1016/S0013-4686(00)00437-0
  6. L. Czerski, S. Mrowec, T. Werber, J. Electrochem. Soc., 109 (1962) 273 https://doi.org/10.1149/1.2425398
  7. K. N. Strafford, P. K. Datta, A. F. Hampton, F. Starr, W. Y Chan, Corros. Sci., 29 (1989) 775 https://doi.org/10.1016/0010-938X(89)90112-1
  8. D. B. Lee, J. H. Ko, S. C. Kwon, Mater. Sci. Eng., A380 (2004) 73
  9. ASM Handbook, Vol. 5, p. 201, Ohio, USA (1994)
  10. R. Peraldi, D. Monceau, B. Pieraggi, Oxid. Met., 58 (2002) 275 https://doi.org/10.1023/A:1020102604090