Research Article
Morphology Characterisation of Pitting Corrosion on Sensitized Austenitic Stainless Steel by Digital Image Analysis
Table 1
Variation of pitting corrosion parameters measured on exposed surfaces.
| | Parameter | Heat treatment | Exposure period (h) | | 48 | 120 | 168 | 216 | 312 |
| | Pit density (mmā2) | I | 15.98 | 28.02 | 39.76 | 200.09 | 378.06 | | II | 19.03 | 25.15 | 34.12 | 34.16 | 40.20 | | III | 9.02 | 10.45 | 15.34 | 14.09 | 19.99 |
| | Corroded area (%) | I | 0.08 | 0.20 | 0.44 | 0.50 | 2.40 | | II | 0.04 | 0.10 | 0.55 | 0.90 | 1.89 | | III | 0.09 | 0.08 | 0.80 | 1.20 | 3.90 |
| | Area at mouth (m2) | I | 10.09 | 11.98 | 12.65 | 12.32 | 13.07 | | II | 8.87 | 9.67 | 20.14 | 25.08 | 29.76 | | III | 13.45 | 15.11 | 25.23 | 26.23 | 35.28 |
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