| Concentration (mg∙L−1) | CR (mm year−1) | Surface coverage (θ) | ηm (%) |
| 0 | 2.74 × 10−2 | -- | -- |
| 50 HEDP | 1.98 × 10−2 | 0.277 | 27.7 |
| 50 HEDP + 10 Ca2+ | 1.16 × 10−2 | 0.577 | 57.7 |
| 50 HEDP + 10 Zn2+ | 4.05 × 10−3 | 0.852 | 85.2 |
| 50 HEDP + 10 Mg2+ | 8.11 × 10−3 | 0.704 | 70.4 |