ice blast cleaning is a 3-step process
1. Pellet Kinetic Energy
The dry ice pellets are accelerated to make an impact on contaminant
by Ortech delivery system with
supersonic speed, the highest velocities attainable in blasting
industries. This impact force of the pellets triggers fracture
in the layer of the contaminant.
2. Thermal Shock Effect
The dry ice penetrates and creates rapid temperature difference
between the successive micro layers of the contaminants. This
produces localized high shear stresses between them which results
in speedy micro crack propagation leading to final bond failure
at the surface of the substrate.
3. Sublimation (Micro-Explosion)
4. The Substrate / Surface Remains Clean and Completely
The combined impact of energy dissipation and rapid heat transfer
between the pellet and the contaminant results in instantaneous
sublimation of solid C02 into gas, expanding its volume by a factor
of 800. The expansion acts as micro-explosion that removes completely
the layer of contaminant from the substrate.