The compositions of the oxide layers present in the scale were
evaluated with the Mössbauer Spectrometer MIMOS II8. This
equipment performs experiments in backscatter geometry, using a
source 57Co/Rh of 100 mCi initial intensity. The spectra obtained
were analyzed using a program for least-squares fitting to obtain the
Mössbauer parameters (δ, Δ, Bhf) and the spectral areas of each Fe
site (Table 2).