Dry ice blasting uses solid CO2 , a non-abrasive media that won't damage surfaces or equipment. The accelerated, super cooled dry ice pellets or particles, are blasted at supersonic speeds and sublimate on impact resulting in the surface being cleaned, lifting dirt and contaminants off the underlying substrate.
The three primary factors for cleaning are: pellet kinetic energy, thermal shock effect, and thermal-kinetic effective.
These forces are combined and the following factors are adjusted:
- CO2 pellet size and density
One primary benefit to dry ice cleaning is the elimination of secondary waste. The cleaning media, dry ice, does not need to be contained and disposed of.
The very low temperature of the dry ice (-78.5 C) creates a large temperature differential between the dry ice particles and the surface being cleaned, causing thermal shock. As the material
temperature decreases it becomes embrittled, enabling the particle impact to break up the coating.
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