Research Article
Spectrophotometric Method for the Determination of Atmospheric Cr Pollution as a Factor to Accelerated Corrosion
Table 2
Deposition of Cr(III) as a result of coupled Cr(VI) transformation.
| | Experiment group | Exposure conditions | Cr(III) (ppm) | | pH | | 3 | 5 | 7 | 9 |
| | 1 | Humid air | 8.9 ± 0.45 | 8.5 ± 0.045 | 8.7 ± 0.5 | 8.12 ± 0.045 | | 2 | Humid air + Cr(VI) | 11.5 ± 0.08 | 11.05 ± 0.072 | 8.9 ± 0.47 | 8.5 ± 0.2 | | 3 | Humid air + SO2 | 8.35 ± 0.55 | 8.5 ± 0.019 | 8.7 ± 0.20 | 8.7 ± 0.008 | | 4 | Humid air + Cr(VI) + SO2 | 19.5 ± 0.045 | 19.02 ± 0.064 | 10.02 ± 0.035 | 9.07 ± 0.045 | | 5 | Humid air + Cr(VI) + SO2 + Fe+2 | 21.5 ± 0.56 | 19.5 ± 0.53 | 15 ± 1.1 | 11 ± 0.78 |
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NO: not observed in 60 days.
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