Application Areas
Immersion freezing & cold storage logistics & food industry, pharmaceutical and chemical engineering & life sciences & ultra-low temperature cryogenic systems, etc.
Physical & Chemical Properties
Non-toxic, high specific heat, non-corrosive, excellent thermal diffusivity
Temperature Range
-100℃—90℃
Precautions
1. Ensure the system is clean and free of impurities before injection; for large-scale systems, use an N₂-pressurized closed expansion circulation whenever possible.
2. When applied in open systems, a constant-temperature servo cooling circulation filtration system with temperature ≤0°C must be installed.
Zhongfu No.2 parameter reference values (freezing point:-100℃)
Temperature | Specific heat capacity (kJ/kg·K) | Thermal conductivity (W/m·K) | Viscosity mPa·s (cp) | Density (g/ml) | Boiling point (℃) |
-20℃
| 2.436
| 0.225
| 1.16
| 0.828
| 70
|
-40℃
| 2.378
| 0.223
| 1.77
| 0.848
| 70
|
-60℃
| 2.338
| 0.221
| 2.96
| 0.867
| 70
|
-80℃
| 2.323
| 0.218
| 5.83
| 0.886
| 70
|
-100℃
| 2.313
| 0.217
| 10.15
| 0.902
| 70
|
Zhongfu No.2 concentrate concentration and freezing point reference values
Zhongfu No.2 Concentrate concentration | 21% | 32.5% | 34.6% | 48% | 50% | 56% | 56% |
Freezing point
| -10℃
| -20℃
| -30℃
| -40℃
| -50℃
| -60℃
| -100℃
|
Specific gravity
| 0.962
| 0.94
| 0.932
| 0.911
| 0.904
| 0.890
| 0.8
|
Zhongfu No.2 corrosion test
Zhongfu No.2 corrosion test (specification of hanging specimen)Type II immersion for 168h)GBT 18175-2000
Test item | Pre-test weight (g) | Post-test weight (g) | Test duration in hours (g) | Post-test weight loss (mg) | Corrosion rate (g/m2h) | Corrosion rate (mm/a) |
A3 steel
| 13.0090
| 13.0060
| 168
| 3
| 0.00886
| 0.00987
|
Copper
| 14.8150
| 14.8150
| 168
| 0
| 0.00000
| 0.00000
|
Aluminum YL12
| 4.5990
| 4.5970
| 168
| 2
| 0.00590
| 0.01860
|
304 Stainless Steel
| 13.1100
| 13.1100
| 168
| 0
| 0.00000
| 0.00000
|