The safe way to clean or remove surface deposits without any media debris, solvent action or damage to the surrounding environment.
For dry ice blasting in Middlesbrough, Stockton-on-Tees or the surrounding areas that produces extra shiny results, call us on
This photograph shows 3mm dry ice pellets releasing their cleaning power while rapidly subliming on the top of a blast unit.
Dry ice pellets, which are pure solid carbon dioxide, are made by decompressing liquid C02 to create C02 snow. The snow is then compacted and extruded through a die plate to form solid CO2 pellets.
Dry ice is unstable above minus 78.6 °C, but instead of melting into CO2 liquid when it warms up, it sublimes directly into C02 gas. It is this sublimation process that creates the cleaning effect when dry ice is used as a blast medium.
During blasting the pellets are accelerated to speeds between 200 and 300 m/s with compressed air. They break up as they travel through the blaster and arrive at the work surface as fast moving pinhead sized particles. The particles embed themselves in the pores of any surface deposits and very quickly sublime into a much larger volume of CO2 gas. This rapid generation of gas within an enclosed space breaks up the surface deposit, releases its bond with the substrate and blows it away. The CO2 then diffuses into the atmosphere leaving no debris other than the material removed, which is usually found as a fine dust.
If the substrate is strong enough to resist the effect of the gas generation it will not be damaged or abraded and, because CO2 is chemically inert, there will be no chemical reactions to alter the substrate’s surface ﬁnish.
Also, as sublimation takes place on ﬁrst impact, there is no secondary impact to cause undesirable effects to the surrounding area or localised equipment, all of which makes the process safe and ideal for use in an Open environment, and as an in-situ tool cleaner.
If the substrate is porous so that gas generation can also occur within its pores the cleaning may not be abrasion free. With porous substrates the deciding factor is the strength of the material. A porous sintered metal will withstand the gas generation, but a friable material like soft wood or plaster will not. Also, composite materials will show differing effects. For example the talc will be leached out of the surface of talc ﬁlled plastic leaving the surface roughened, whilst the same plastic without the talc, will clean without damage.
If the solid dry ice particles find it difﬁcult to penetrate the layer that should be removed, cleaning will be very slow or impossible. Typical materials that are hard to penetrate are oven cured paints or enamels and elastic materials commonly used as sealants. Dry ice cleaning is slower than an abrasive process on many materials and cannot create any speciﬁc surface finish standard, e.g. rust will be removed, but the underlying steel surface will remain pitted.
Aircraft wing paint booths
Automotive welding robots and jigs Automotive interior cladding formers
Boiler membrane walls
Braking systems on cars, planes and trains Can lacquer lines and printers
Chocolate moulds and process machinery Cigarette manufacturing machinery
Classic car components
Dirt and grease from machinery
Electric train conductors and control gear Film casting bands and equipment
Food contact surfaces
Food processing machinery
Heat exchangers and radiators
Hot and cold core boxes
Injection moulding tools
Laminate flooring machinery
High performance racing engines
Petrochemical heater tubes
Plastic sheet and film extrusion dies
Plastic casting tools
Rotational moulding tools
Rubber moulding tools
Sluice gate chains
Alumina based die coating removal at 300°C
Cleaning a V10 Le Mans racing engine
Ageing deposits from brickwork and hardwood
Alumina based die coatings from LP casting dies
Antifouling coatings from boat hulls
Anti-wetting films prior to brazing or welding
Baking residues from baking bands
Coatings from high value complex parts
Carbon (coke) from racing engines
Condensates from plastic moulding tools
Epoxy resins from mixing equipment
Film deposits from optical components
Flash from foiled mobile phone lenses
Flavouring deposits from food conveyors
Fluxes or coatings applied incorrectly
Gasket residues from engine heads
Glue residues from wood presses
Graphite based die coating from HP casting dies
Greasy films prior to application of adhesives
Ink from printing and packaging processes
Paint from carbon fibre parts
Plaster from complex castings
Production spillages or leftovers from machinery
Aircraft Classic cars
Cutting and forming machinery
Printing and envelope machinery
Road transport vehicles