| | Designation | Exposing condition | Solution acidity | Specimen grouping | Immersion time (days) |
| | Series 1 | Pure water | pH 7.0 | 6 specimens in a group, 18 groups | 5, 10, 15, 20, 25, 30, 35, 40, 45, 55, 65, 75, 100, 105, 130, 180 | | Series 2 | H2SO4 + HNO3 (molar ratio is 9: 1) | pH 3.5 | 6 specimens in a group, 15 groups | 5, 10, 15, 20, 25, 30, 35, 40, 45, 55, 65, 75, 100, 130, 180 | | Series 3 | H2SO4 + HNO3 (molar ratio is 9: 1) | pH 2.5 | 6 specimens in a group, 15 groups | 5, 10, 15, 20, 25, 30, 35, 40, 45, 55, 65, 75, 100, 130, 180 | | Series 4 | H2SO4 + HNO3 (molar ratio is 9: 1) | pH 1.5 | 6 specimens in a group, 11 groups | 5, 10, 25, 35, 45, 55, 65, 80, 90, 105, 130 |
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