Specifications of Magnesium Alloy
| Grade | Max. Tensile Strength (Mpa) | Max. Pressure Strength (Mpa) | Yield Strength (Mpa) | Shear Strength (Mpa) | Elongation (%) | Elasticity Modulus（GPa） | Hardness (HB) | Testing Conditions | Dissolution Rate mg/(cm2*hr) | Dissolution Rate mm/hr | Density (g/cm3) | Sample Rod Size | |
| Temp.(℃ ) | Concentration of CL | ||||||||||||
| HH-006 | 380 | 430 | 260 | 140 | ＞3 | 44.8 | ＞80 | 93 | 3% | 50-70 | 0.56 | 1.83 | Φ110×1000 |
| 380 | 430 | 260 | 140 | ＞3 | 44.8 | ＞80 | 93 | 1% | 20-35 | 0.35 | 1.83 | Φ110×1000 | |
| 240 | 180 | 26 | 150 | Φ90 | |||||||||
| HH-006A | 320 | 366 | 240 | 162 | ＞6 | 44.8 | ＞75 | 93 | 3% | 50-70 | 0.56 | 1.83 | Φ70×1000 |
| 320 | 366 | 240 | 162 | ＞6 | 44.8 | ＞75 | 93 | 1% | 20-30 | 0.35 | 1.83 | Φ70×1000 | |
| HH-008（012） | 410 | 486 | 290 | 197 | ＞5 | 45 | ＞100 | 93 | 3% | 40-55 | 0.46 | 1.94 | Φ110×1000 |
| 410 | 486 | 290 | 197 | ＞5 | 45 | ＞100 | 93 | 1% | 15-25 | 0.3 | 1.94 | Φ110×1000 | |
| 310 | 260 | 12 | 250 | Φ90 | |||||||||
| HH-008A | 410 | 486 | 290 | 197 | ＞5 | 45 | ＞100 | 93 | 3% | 60-80 | 0.68 | 1.94 | Φ110×1000 |
| 410 | 486 | 290 | 197 | ＞5 | 45 | ＞100 | 93 | 1% | 35-50 | 0.42 | 1.94 | Φ110×1000 | |
| HH-008B | 350 | 408 | 240 | 176 | ＞7 | 44.8 | ＞85 | 93 | 3% | 30-45 | 0.43 | 1.93 | Φ110×1000 |
| 350 | 408 | 240 | 176 | ＞7 | 44.8 | ＞85 | 93 | 1% | 15-25 | 0.25 | 1.93 | Φ110×1000 | |
| HH-010 | 200 | 325 | 130 | 99 | 24 | 44.3 | ≥40 | 93 | 3% | 20-30 | 0.12 | 1.8 | Φ110×1000 |
| HH-011 | 410 | 486 | 300 | 197 | ＞4.5 | 44.8 | ＞100 | 93 | 3% | 20-35 | 0.28 | 1.93 | Φ110×1000 |
| 410 | 486 | 300 | 197 | ＞4.5 | 44.8 | ＞100 | 93 | 1% | 8-15 | 0.17 | 1.93 | Φ110×1000 | |
| HH-016 | 280 | 350 | 190 | 127 | 13 | 44.8 | ＞60 | 93 | 3% | 40-55 | 0.46 | 1.8 | Φ110×1000 |
| 280 | 350 | 190 | 127 | 13 | 44.8 | ＞60 | 93 | 1% | 15-25 | 0.25 | 1.8 | Φ110×1000 | |
| HH-017 | 210 | 352 | 150 | 99 | 18 | 44.8 | ＞60 | 93 | 3% | 40-55 | 0.48 | 1.8 | Φ110×1000 |
| 210 | 352 | 150 | 99 | 18 | 44.8 | ＞60 | 93 | 1% | 15-25 | 0.19 | 1.8 | Φ110×1000 | |
| HH-017K | 235 | 352 | 170 | 120 | 15 | 44.8 | ＞60 | 93 | 3% | 100-130 | 0.75 | 1.81 | Φ110×1000 |
| 235 | 352 | 170 | 120 | 15 | 44.8 | ＞60 | 93 | 1% | 50-70 | 0.45 | 1.81 | Φ110×1000 | |
| HH-018 | 230 | 362 | 170 | 130 | 12 | 44.4 | ≥45 | 50 | 0.84% | 35-50 | 0.42 | 1.82 | Φ110×1000 |
| HH-019 | 235 | 352 | 170 | 120 | 7 | 44.5 | ＞55 | 93 | 3% | 160-190 | 0.86 | 1.8 | Φ110×1000 |
| 235 | 352 | 170 | 120 | 7 | 44.5 | ＞55 | 45 | 0.10% | 20-40 | 0.15 | 1.8 | Φ110×1000 | |
| HH-021 | 305 | 415 | 220 | 140 | ＞3 | 44.5 | ＞65 | 43 | 0.05% | 80-100 | 0.81 | 1.94 | Φ110×1000 |
| HH-022 | 305 | 415 | 220 | 155 | ＞4.5 | 44.8 | ＞80 | 43 | 0.05% | 45-60 | 0.45 | 1.94 | Φ110×1000 |
| HH-023 | 275 | 385 | 180 | 140 | 8 | 44.5 | ＞65 | 43 | 0.05% | 20-35 | 0.27 | 1.93 | Φ28×1000 |
| HH-024 | 280 | 415 | 240 | 145 | ＞4.5 | 44.8 | ＞70 | 43 | 0.05% | 45-65 | 0.46 | 1.83 | Φ60×1000 |
| HH-808 | 370 | 486 | 262 | 197 | ＞3.5 | 44.8 | ＞100 | 50 | 0.84% | 40-60 | 0.44 | 2.16 | Φ110×1000 |
Dissolvable Frac Ball HCL Acid Resistance Test
Experimental purpose: Obtain the acid corrosion resistance of the coating soluble ball in a certain temperature and certain concentration of HCL solution through experimental observation
Experimental steps:
1. Prepare experimental equipment, soluble ball, solute (HCL), clean water, beaker, balance, vernier caliper Constant temperature water bath
2. Check the appearance and size of the soluble ball, and take a photo
3. Prepare 20% HCL solution
4. Immerse the coating soluble ball in HCL solution
5. The constant temperature box maintains the HCL solution at a certain temperature, and observes the acid corrosion resistance of the soluble ball
6. Take out the soluble ball at intervals, check the appearance, shape and size of the soluble ball, and record the soluble ball weight, reconstitute the acid solution, continue to observe the corrosion resistance of the soluble ball
Test index: record the corrosion resistance of the soluble ball every 24 hours
Experimental considerations: every time during an acid resistance check, pay attention to safety, record relevant data and take pictures clearly
| Date | Test location | Model | By |
| 2020.11.15.10:00 | Wingoil Lab | Dissolvable Magnesium aluminum alloy ball with Protection Coating | Li Zhuo |
| Temperature | Fluid | HCL Acid | |
| 70℃ | HCL | 20% |
Solution preparation and appearance of acid-resistant soluble ball
Remarks (appearance of soluble ball): smooth and bright surface
Corrosion resistance after 24h
Corrosion resistance after 48h
Corrosion resistance after 60h
Remarks (appearance of soluble ball): The soluble ball is corroded with a few holes, the largest hole diameter is 6mm, and the depth is 2mm
Corrosion resistance after 72h
Remarks (appearance of soluble ball): The gap of the soluble ball is slightly deepened, the gap diameter is 30mm, and the depth is 11mm
Experimental results:
The coating soluble ball is at 70℃, 20% concentration of HCL solution, within 24 hours, the acid corrosion resistance is good, and the soluble ball coating is intact; 24-48 hours, the soluble ball has a few holes, 48-60 hours, A slightly larger gap appears, and within 60-72 hours, the gap is slightly deepened and enlarged.
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