Our Dry Ice Blasting service is an industrial cleaning process in which particles of solid carbon dioxide are propelled at high velocities to impact and clean a surface. These particles are accelerated to supersonic speeds by compressed air and delivered via a hand held or robotised nozzle at the surface to be cleaned.
The dry ice pellets hitting the component cause a sudden punctual supercooling of the coating or contaminant that has to be removed. Due to the different thermal expansion coefficients of the contaminant and the substrate thermal tensions emerge between the two layers. The contaminant embrittles, debonds and is removed.
The energy produced during this procedure is chiefly responsible for the actual cleaning process. Kinetic energy is transferred from the dry ice media to the surface which removes the contaminant and is then converted to heat producing sublimation (the process of turning from solid to vapour).