Table 1.
Summary of the speciation based on SEM/EDX, ATR-FTIR imaging, and RMS analysis. [TBP: tributyl phosphate].
| Sample | Layer # | Elements from EDX | ATR-FTIR and RMS Assignment | |
|---|---|---|---|---|
| Major | Minor | |||
| A | #1 | C, O | Enamel or alkyd resin | Polyalkoxylated phenol |
| #2 | C, N, O, Ti, Al-flakes | Alkyd-melamine resin | Rutile (TiO2), Al-flakes | |
| #3 | C, N, O, Ti, Al, Si, Na | Acrylic-melamine resin | Rutile, Kaolinite | |
| #4 | C, O | Enamel or alkyd resin | Polyalkoxylated phenol | |
| #5 | C, N, O, Ti, Al | Alkyd-melamine resin | Rutile, Al-flakes | |
| #6 | C, N, O, Ti, Al, Si, Na | Acrylic-melamine resin | Rutile, Kaolinite | |
| #7 | C, N, O, Ti, Al, Mg, Si, S | Acrylic-melamine resin | Rutile, talc, Al2(SO4)3 | |
| #8 | C, N, O, Ti, Al, Si, Zn, Sn | Ester-epoxy resin | Pyrophyllite, SnO2 | |
| #9 | C, N, O, Al, Si, Ti, Fe, Zn, P | Non-ester epoxy resin | Kaolinite, Zn3(PO4)2 | |
| ZnO, Fe3O4 | ||||
| B | #1 | C, N, O, Al, Si, Ti, S, Sn | Ester-epoxy resin | Kaolinite, rutile, SnO2 |
| #2 | C, N, O, Ba, S, Al, Si, Fe | Alkyd-melamine resin-I | BaSO4 | |
| #3 | C, N, O, Ba, S, Cu, Cl | Alkyd-melamine resin-I | BaSO4, CuCl2 | |
| #4 | C, N, O | Alkyd-melamine resin-II | -- | |
| #5 | C, N, O, Al | Acrylic (butyl) resin | Al2O3 | |
| C | #1 | C, O, Mg, Si, Ca, Ti, Al | Polybutadiene + TBP | Talc, CaCO3, rutile |
| #2 | C, O, Mg, Si, Ca, Ti, Al | Polybutadiene + TBP | Talc, CaCO3, rutile | |
| #3 | C, O, Al, Ti, Fe | Acrylic copolymer | Al-flakes | |
| #4 | C, N, O | Acrylic copolymer | -- | |