Dry Ice Blasting uses a metering
unit to feed particles of dry ice into a high
velocity air stream (compressed air), through a hose and nozzle
and onto a surface. Dry ice is the solid frozen state of carbon
dioxide (Co2). At a temperature of -78°C (-109.3 F), dry
ice is 100% free of water and is therefore 100% non-conductive.
Dry ice converts to Co2 vapor on surface impact. The thermal
shock from the very cold temperature aids in the removal of the
contaminant. It does not abrade or damage the substrate surface
and leaves no secondary residue to clean up.
Dry ice blasting is very safe
and economical. Co2 is a normal part of the earth's atmosphere
and is the gas exhaled when we breathe. Being 100% water free,
there is no danger from live electrical apparatus. In fact, electrical
equipment surfaces can be cleaned without disconnecting electricity.
There is no blasting media residue to be managed or cleaned up,
like there is with sand or bead blasting. This makes the process
economical, since the cleanup of blasting media would typically
take longer than the blasting job itself not to forget to mention
that used media is considered hazardous waste and is very expensive
to dispose of.