Research Article
Corrosion Investigation of Rock Anchors Served over 10 Years in Underground Powerhouse of a Hydropower Station
Table 3
Groundwater aggressivity in the underground main powerhouse.
| Item | Time (year) | Test value | Standard value | Description |
| HCO3− | 2018 | 2.61 mmol/L | >1.07 mmol/L | No dissolution corrosion | 2019 | 2.59 mmol/L |
| pH | 2018 | 8.25 | >6.5 | No general acidic corrosion | 2019 | 8.28 |
| Mg2+ | 2018 | 25.34 mg/L | <1000 mg/L | No magnesium sulfate corrosion | 2019 | 50.60 mg/L |
| SO42− | 2018 | 61.0 mg/L | <250 mg/L | No magnesium sulfate corrosion | 2019 | 49.4 mg/L |
| Cl− | 2018 | 22.48 mg/L | <100 mg/L | Slight corrosion | 2019 | 18.80 mg/L |
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