Frequently Asked Questions - Page 1

1 2 3 4 5 6

1- What is dry ice?

Dry ice is carbon dioxide in solid form. It can be produced as pellets or blocks of various sizes.
TOP OF THE PAGE

2- What is Dry Ice Blasting?

Dry ice blasting is a revolutionary blasting method in which dry ice pellets replace traditional blasting materials like sand, water, glass and plastic. In contrast to sand blasting, the process leaves no secondary waste material. The only waste to be disposed of is the coating that has been dislodged, and this can normally be swept or vacuumed from the floor beneath the treated object. The process is dry and non-conductive, and it is therefore suitable for use on electric motors and electrical circuitry.
TOP OF THE PAGE

3- How Does Dry Ice Blasting Work?

Dry ice pellets are accelerated in a jet of compressed air and strike the coating to be removed at velocities up to the speed of sound. Cleaning results from three effects:
Kinetic Effect:
When dry ice pellets strike a surface at the speed of sound, any coating on the surface is cracked and loosened.
Thermal Effect:
The low temperature of dry ice pellets makes the coating brittle, cracks it and loosens it as a result of reduced bonding between the coating and the underlying surface. This allows dry ice to permeate the coating.
Explosive Effect – Sublimation:
Dry ice penetrates the coating and immediately sublimes (passes directly from solid to vapor state). This results in a 700-fold increase in volume, an explosive effect that lifts the coating off the surface.
TOP OF THE PAGE

4- What are Pellets?

Pellets are carbon dioxide in solid form shaped into small particles about the size of grains of rice.
TOP OF THE PAGE

5- Why Should I Use Dry Ice Blasting Instead of Traditional Blasting Methods?

Dry ice blasting is a completely dry process. Dry ice blasting is non-toxic, non-conductive and non-abrasive. Dry ice vaporizes immediately on contact with treated surfaces. This gives several advantages in comparison with traditional blasting methods. With dry ice blasting there is no secondary waste material (sand, glass, plastic, etc.). The only waste to be swept or vacuumed up is the coating dislodged by the treatment. It is therefore possible to clean objects in which other blasting methods' residual blasting material would collect in every inaccessible corner. Dry ice blasting allows cleaning to be performed while machines are running, without the need for dismantling. This is, of course, of great economic importance as costly downtime can be eliminated or drastically reduced.
TOP OF THE PAGE

6- What Happens to the "Blasted-off" Coating?

1) Dry coatings crack into small flakes that can be swept or vacuumed. 2) Moist coatings (e.g. oil or grease) are carried away in the compressed-air jet in a fashion similar to that seen with high-pressure hosing. The treated surface is left dry and clean.
TOP OF THE PAGE

7- Which Materials Can Withstand Dry Ice Blasting?

As the process is dry and non-abrasive, any material can be cleaned by dry ice blasting without ill effects. For example, perspex and highly polished aluminum can be treated without the surface becoming matt.
TOP OF THE PAGE

1 2 3 4 5 6