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Table 1
Summary of Corrosivity Classes and Kinetics; values of corrosion rates are from [27].
| Corrosivity level | Environmental conditions | Corrosion rate (mg · m−2 · yr−1) | Corrosion rate (μm/yr) |
|---|---|---|---|
| C1 − Very Low | Clean air | ≤40 | ≤ 0.1 |
| C2 − Low | Low pollution | 40 − 150 | 0.1 − 0.4 |
| C3 − Medium | Moderate pollution | 150 − 400 | 0.4 − 1.0 |
| C4 − High | High salinity | 400 − 700 | 1.0 − 1.8 |
| C5 − Very High | Aggressive atmosphere | 700 − 1600 | 1.8 − 4.0 |
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