Dry Ice Blasting or Cryogenic Cleaning is a technology in which
particles of solid carbon dioxide (dry ice) are propelled in a
high velocity air stream to impact and clean a surface. The combined
impact energy and low temperature (-110° F) of the co2 particles
produces a thermal-kinetic effect that removes contaminants and
coatings from the inside out.
Dry Ice is non conductive, thus Dry Ice blasting allows for on
site cleaning of electrical components and eliminates the need
for drying prior to re-energizing electrical equipment.
This new development is quickly expanding around the world. Paint,
oil, grease, asphalt, tar, decals, dirt, ink, resins, and adhesives
are some of the materials removed by this procedure. Only the
removed material must be disposed of, as the dry ice sublimates
into the atmosphere.
This method is superior to sandblasting because the dry ice is
non abrasive or corrosive , it is soft enough not to pit or damage
the underlying surface. The dry ice sublimes quickly into the
air and only the removed material must be cleaned up. Dry Ice
blasting eliminates equipment damage in two ways. First, dry ice
does not erode or wear away the targeted surface as traditional
grit media and even wire brushes do. This means that surface integrity
and critical tolerances are preserved and equipment will not have
to be replaced due to surface erosion common with sand, glass
beads, and other abrasive media.
Second, with traditional cleaning methods, equipment is often
damaged (bumped, dropped, etc.) while in transit to or from the
dedicated cleaning area. Instead most equipment and machinery
can be cleaned while in place.
Finally, Dry Ice blasting is used in place of many environmentally
damaging solvents. These chemicals include trichlorethane, methylene
chloride, perchlorethane, orthodichlorobenzene, cresylic acid,
and caustic solutions. Since dry ice evaporates completely as
a gas it leaves no wastes. Only the material being removed must
be disposed of. When dry ice cleaning replaces hazardous chemical
cleaners the disposal cost of that chemical is eliminated.