Abstract:
Among the various characterization techniques, X-ray diffraction (XRD) analysis is a key
method which reveals various phases and protective oxides formed on the surfaces of exposed
specimens. This paper discusses the XRD study of two boiler steels, namely ASTMSAE213-T22
and SAE-347H with and without High Velocity Oxy-fuel (HVOF) spray Cr3C2-NiCr coating, which
were exposed to air, molten salt [Na2SO4-82%Fe2(SO4)3], and actual boiler environments. XRD
analysis has been discussed and the results obtained from the analysis are shown. The performance
of the steels was found to improve after the deposition of the coating, which may be attributed to
the formation of protective phases.
