TABLE 3.
Dominant elements of interest (weight percent) making up the corrosion scale layers
| Sample ID | Layer | Al | Ca | Ca | Cl | Fe | Na | P | Pb | Zn |
|---|---|---|---|---|---|---|---|---|---|---|
| Pb-A | L1 | 16.0 | 0.9 | 7.4 | 0.04 | 2.2 | 0.1 | 12.1 | 14.6 | 0.02 |
| L2 | 14.1 | 1.4 | 5.8 | 0.1 | 0.4 | 0.1 | 8.6 | 30.0 | 0.03 | |
| L3 | 5.0 | 1.6 | 1.2 | <RL | 0.4 | <RL | 2.3 | 62.7 | 0.03 | |
| L4 | <RL | 0.6 | 0.1 | 0.2 | 0.1 | <RL | 0.1 | 83.7 | 0.03 | |
| Pb-B | L1 | 16.2 | 1.1 | 7.0 | 0.1 | 1.6 | 0.1 | 10.7 | 13.3 | 0.03 |
| L2 | 9.0 | 1.9 | 1.9 | 0.1 | 0.5 | 0.1 | 3.3 | 46.9 | 0.02 | |
| L3 | 4.6 | 1.1 | 0.7 | 0.1 | 0.4 | 0.2 | 1.8 | 61.7 | 0.02 | |
| L4 | 0.8 | 0.3 | 0.1 | 0.1 | 0.03 | 0.1 | 0.2 | 76.2 | 0.02 | |
| G | L1 | 4.2 | 1.9 | 1.4 | 0.2 | 31.3 | 4.3 | 2.7 | 0.8 | 21.7 |
| L2 | 0.5 | 1.5 | 0.8 | 0.05 | 56.5 | 1.3 | 0.2 | 0.1 | 5.8 | |
| L3 | 0.6 | 3.0 | 0.2 | 0.08 | 55.6 | 1.6 | 0.1 | 0.1 | 7.8 | |
<RL—below reporting limit, Al—aluminumn, C—carbon, Ca—calcium, Cl—chloride, Fe—iron, G—galvanized, ID—identification, Na—sodium, P—phosphorus, Pb—lead, Zn—zinc
a
Combustion analysis for carbon, X-ray fluorescence analysis for all other elements