Dry ice abrasive is obtained by expanding liquid carbon dioxide and pressing.
Chemically, dry ice is solidified carbon dioxide at a temperature of -78.5 degrees Celsius.
Under normal conditions (i.e., standard ambient temperature), this abrasive does not melt,
but changes from a solid to a gaseous state.
Thus, the use of dry ice in surface treatment processes guarantees the absence of production of technological waste (in contrast to, for example, the method of sandblasting, which is characterized by a strong contamination of the environment). Granules with a diameter of 3 millimetres are most commonly used.
The method of cleaning with dry ice is used:
- in industrial plants in the rubber, lacquer and food sectors,
- to remove dirt from printing presses,
- to clean control cabinets.
It is interesting to note that dry ice can be used to clean live electrical equipment.
Like soda blasting, the method is environmentally friendly. At the end of the process, all that remains is the dirt removed from the surface and a small amount of carbon dioxide (CO2) is released into the atmosphere.