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| mixed acid ratio concentration (%) | corrosion rate at different reaction times (%) | |||||||
|---|---|---|---|---|---|---|---|---|
| number | HCl | HF | CH3COOH | 1 h | 3 h | 6 h | 12 h | |
| A | 9 | 3 | 3 | 6.38 | 7.59 | 7.20 | 11.63 | |
| B | 6 | 6 | 3 | 5.34 | 7.75 | 9.90 | 11.87 | |
| C | 4.5 | 6 | 4.5 | 3.70 | 5.72 | 9.24 | 10.38 | |
| D | 3 | 6 | 6 | 2.45 | 6.82 | 8.32 | 11.90 | |
| E | 3 | 9 | 3 | 6.28 | 11.36 | 14.83 | 14.90 | |
| F | 3 | 3 | 9 | 1.98 | 3.39 | 4.21 | 5.87 | |
