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ANTIFROGEN KF

ANTIFROGEN KF

LOW-VISCOSITY, LOW-TEMPERATURE BRINE FOR THE FOOD SECTOR, ANTIFREEZE AND CORROSION-INHIBITING MEDIUM

Antifrogen KF is a non-toxic clear liquid, based on an aqueous formate solution which is used as a low-temperature brine down to -50 °C in industrial and food refrigeration systems. The brine adjusted for reliable protection against freezing is inhibited with non-toxic corrosion inhibitors and is nitrite, amine and borate-free.

 
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Antifrogen KF fulfills a dual function as a refrigerating medium. It ensures that the aqueous solution remains liquid at the required brine temperature and protects the metals in the system from corrosion. The freezing point of the undiluted brine is about -53 °C.

Antifrogen KF fulfills a dual function as a refrigerating medium. It ensures that the aqueous solution remains liquid at the required brine temperature and protects the metals in the system from corrosion. 

The freezing point of the undiluted brine is about -53 °C, and the brine has a strong tendency to supercool. Supersaturated solutions can however be induced to crystallize out by inoculation. 
The values shown in the „freezing point“ curve were obtained by this means, and so they provide a reliable guide to the lowest possible temperature in the refrigeration system. Experience indicates that the brine temperatures obtainable in practice in this way are 8-4 °C higher. 

To prevent precipitation, only fully dionized (distilled) water may be used for diluting Antifrogen KF. All in the table mentioned materials are protected against corrosion in dilution up to 51 % V/V (= -20 °C). In further dilution with water up to 31 % V/V (= -10 °C) it is recommended to use stainless steel or copper instead of ferrous metals.

​It must not be mixed with other brines, especially with chloride brines but also with glycol brines (e.g. Antifrogen N or L).

Density at 20°C (DIN 51757) g/cm⊃3; 1.343
Refractive index at 20°C (DIN 51423, Part 2) '' 1.387
pH-Value undiluted (DIN 51369) '' approx 11
Freezing point (ASTM D 1177) °C approx. -60
Boiling point at 1013mbar (ASTM D 1120) °C +115
Pour point (DIN 51597) °C Below -60
Kinematic viscosity (DIN 51562) mm⊃;2;/s 2-3 Approx 25
Specific heat KJ/Kg *K approx. 2.6 approx. 2.5
Thermal conductivity W/mK approx. 0.46 approx. 0.39