Antifreeze based on monoethylene glycol with corrosion inhibitors
Specifically designed for the water circuit in cooling and heating systems
The following table shows the antifreeze effect when mixed with water:
| ANTIFROST (wt-%) | Water | Freeze protection until | Density (at15 °C) |
|---|---|---|---|
| 15% | 85% | – 5 °C | 1,023 |
| 23% | 77% | – 10 °C | 1,034 |
| 28% | 72% | – 15 °C | 1,041 |
| 33% | 67% | – 20 °C | 1,049 |
| 38% | 62% | – 25 °C | 1,057 |
| 42% | 58% | – 30 °C | 1,063 |
Particular attention should be drawn here to the high reserve alkalinity in ANTIFROST, which prevents the formation of acidic oxyacids in the system during oxidation caused by air entering the system.
Mixing ANTIFROST with other antifreeze agents and adding other chemicals (e.g., corrosion inhibitors) should be avoided, as this could potentially lead to negative effects.
If a heating system containing ANTIFROST is drained and filled with water, it must be thoroughly rinsed, as highly diluted solutions of ANTIFROST can have a corrosive effect in the long term.
As the proportion of ANTIFROST decreases, so does the corrosion protection – the content of ANTIFROST must therefore not fall below 23 wt%.
Chemical-physical data
| Density at 20°C (according to DIN 51757) [g/cm3] | 1,11 |
| Refractive index (ND at 20°C) (according to DIN 51423) | 1,425 |
| Reserve alkalinity: 0.1 ml normal HCl per 10 g sample (according to ASTM-D-1121) | 41,7 |
| pH value of the undiluted solution (according to ASTM-D-1278) | 7,3 |
| pH value of the aqueous solution 33 vol% antifreeze (according to ASTM-D-1278) | 8,8 |
| Boiling point at 760 Torr (according to ASTM-D-1120) | 198°C |
| Flash point in a closed crucible according to Pensky-Martens (according to ÖNORM C 1122) | 110°C |
| Specific heat at 20°C [cal/g °C] | 0,56 |
| Thermal conductivity at 20°C [cal/cm.s. °C] | 0,00062 |
| Cubic expansion coefficient at 20°C [1/K] | 6,9.10-4 |
Based on the Austrian standard ÖNORM H5195-2, the system water of a heating or cooling system equipped with ANTIFROST must be checked in the laboratory at regular intervals (every 2 years).
A rough check of ANTIFROST solutions is possible by measuring the density (from which the freezing protection effect can also be seen with the help of the table above) and the pH value (which should be between 7 and 9).
The inhibitors contained in ANTIFROST protect iron, aluminum, and also copper and its alloys; plastics such as polyethylene and polypropylene (from which most underfloor heating pipes are made) are also not attacked by ANTIFROST.
Materials made of zinc or galvanized surfaces should not be used, as this metal could be destroyed by glycol-containing heat transfer fluids, producing hydrogen.
Evaluation of the corrosion test with the antifreeze agent ANTIFROST according to the ASTM D-1384-70 test
| checked material (in the so called ASTM metals package) |
mass loss per unit area in grams / m2 at 1000 hours test period |
|
|---|---|---|
| ethylene glycol without supplement |
Antifrost with Inhibitor | |
| Copper SF-CU W.Nr. 2.0090 |
3,5 | 1,0 |
| Lot L-PbSn 33 W.Nr. 2.3433 |
140 | 3,0 |
| Brass Cu Zn 37 W.Nr. 2.0321 |
3,5 | 1,0 |
| Grey cast iron GG-15 W.Nr. 0.6015 |
475 | 1,0 |
| Steel RRST-1405 W.Nr. 1.0338.6 |
110 | 1,5 |
| Aluminium casting G-AlSi Cu 4 W.Nr: 3.2151 |
4,5 | 1,5 |
The values shown were taken from the expert report of the Technical Inspection Association (TÜV), on the basis of which ANTIFROST received the quality mark. To maintain the validity of the quality mark, this report is renewed every three years, or rather, it is re-examined to ensure that ANTIFROST still meets the requirements.
ANTIFROST solutions must not be discharged into the sewer system, as ANTIFROST contains ethylene glycol and is therefore (like other antifreeze products) hazardous waste – ANTIFROST or ANTIFROST solutions must therefore be handed over to a hazardous waste collector or a hazardous waste disposal company.
You might also be interested in…
Why you can rely on our expertise
With over 70 years of experience, we offer customized solutions for all water treatment needs, from heating and steam boiler systems to drinking water systems.
Our innovative renovation methods minimize operational disruptions and ensure long-lasting protection of your water systems, while conserving resources.
We offer a wide range of chemical additives, cleaning agents and protective agents that meet the highest quality standards and are suitable for a variety of applications.
Our experienced team is on hand to provide expert advice and individual service to optimally meet your specific requirements.
