Figure 6

(a) XRD patterns of Ni–20Cr foils before and after corrosion in different molten salt conditions for 1 h at 700 °C. The peaks correspond to Ni–20Cr. (b) Comparison of XRD pattern of Ni–20Cr foils after corrosion in KCl–NaCl in air, with transmission versus reflection geometries. The main peaks correspond to Ni–20Cr, with Cr₂O₃ peaks labeled with triangles. A zoom-in view of (b) is shown in (c) to focus on the Cr₂O₃ peaks. The x-axis was converted to the Q-space for comparing the signals measured with different incident X-ray energies in the laboratory and synchrotron instrument.