Materials
Apillar-shaped paint multilayer fragment having an approximately square (750 μm × 750 μm) cross section, originating from a VW Passat motor car, was scanned with a 1.2-mm translation range (x) and a 180◦ rotation range (ω) with step widths x of 15 μm and ω of 3◦, and an acquisition time of 10 s per point. The complete rotational movement (over 180◦) occurred clockwise (looking from the top). In total, 81 × 61 = 4941 XRF spectra and transmission diffractograms were recorded. A summary of the identified pigments is given in Table 1 with their corresponding ICDD PDF-2 database number. As only crystalline material can be identified by XRD, only information is obtained about the (inorganic) pigments and not about the matrix polymers, which often are amorphous polymeric substances and usually identified with Raman, FTIR, py-GC-MS[18–20] or other techniques typically used in automotive paint analysis. The elemental composition of the different paint layers is qualitatively revealed by the corresponding XRF spectra (Table 2).
Materials
Apillar-shaped paint multilayer fragment having an approximately square (750 μm × 750 μm) cross section, originating from a VW Passat motor car, was scanned with a 1.2-mm translation range (x) and a 180◦ rotation range (ω) with step widths x of 15 μm and ω of 3◦, and an acquisition time of 10 s per point. The complete rotational movement (over 180◦) occurred clockwise (looking from the top). In total, 81 × 61 = 4941 XRF spectra and transmission diffractograms were recorded. A summary of the identified pigments is given in Table 1 with their corresponding ICDD PDF-2 database number. As only crystalline material can be identified by XRD, only information is obtained about the (inorganic) pigments and not about the matrix polymers, which often are amorphous polymeric substances and usually identified with Raman, FTIR, py-GC-MS[18–20] or other techniques typically used in automotive paint analysis. The elemental composition of the different paint layers is qualitatively revealed by the corresponding XRF spectra (Table 2).
การแปล กรุณารอสักครู่..
