Abstract:
X-ray diffraction (XRD) is a versatile, non-destructive technique that reveals detailed
information about the chemical composition and crystallographic structure of materials. In this
work Ni-20Cr and Ni-50Cr coatings were deposited on two boiler steels namely T22 and SA 516
steel. The measurement of residual stresses of these cold sprayed coatings was done with the help of
X-ray diffraction technique. This paper discussed the XRD study of the as-sprayed coatings. Further
the XRD technique was used to study the uncoated and coated steels after cyclic exposure to air,
molten salt [Na2SO4-60%V2O5], and actual boiler environments. The results obtained from the
XRD analysis have been shown. The weight change results showed that the coated steels performed
better than their uncoated counterparts which might be attributed to the formation of protective
phases
