ASTM G1 · ASTM G102 · API 570 · NACE SP0775
CR = (K × W) / (A × T × D)| < 1 mpy | Negligible | Continue routine monitoring |
| 1–5 mpy | Low | Acceptable for most services |
| 5–10 mpy | Moderate | Review inhibitor program |
| 10–20 mpy | High | Increase monitoring frequency |
| 20–50 mpy | Severe | Immediate action required |
| > 50 mpy | Critical | Consider shutdown/replacement |
Complete coverage of corrosion mechanisms (CO₂, H₂S, O₂, MIC), weight loss calculations, electrochemical methods, NACE standards, and inhibition strategies.