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
|
