What builds up, and why it matters
On this kind of work the problem is release agent, resin, sealant and process residue on tooling and components. Aerospace tooling holds tolerances that abrasive cleaning destroys, and composite work cannot tolerate contamination from the cleaning method itself.
Work is documented and planned against the customer's own process requirements. The people who call us about autoclave are usually tooling and manufacturing engineers, and the thing they are actually worried about is dimensional change or contamination on a controlled part.
The method
Why dry ice and not the alternatives
- Non-abrasive
The pellet is soft and sublimates on impact, so the work is thermal rather than mechanical. Machined faces, plating, paint and gaskets survive it.
- Low moisture
No standing water in a harness, a bearing or a cabinet, and no dry time before the equipment goes back into service.
- No secondary waste
Sand, soda and walnut shell all have to be swept and hauled. Dry ice leaves only the contaminant it removed.
- Often no teardown
Much of this work is done in place, which is usually where the real saving is. The labor is in the disassembly, not the cleaning.
More aerospace work
Related jobs we get called for
Questions we get asked first
Will it damage the surface underneath?
On most substrates, no. The pellet is soft and sublimates on impact, so it does thermal work rather than mechanical work. We still test an inconspicuous spot first on anything unusual.
Do you have to take the equipment apart for autoclave?
Usually far less than you would expect, and often not at all. Cleaning in place is where most of the saving comes from, because the labor is normally in the teardown and reassembly.
How much mess does it make?
Far less than the alternatives, because the blasting media disappears. What is left is the contaminant itself, which we contain and clean up.
Do you come to us?
Yes. The whole rig is mobile. Compressor, hose and operator arrive at your shop, plant, driveway or dock, anywhere across South Florida from Miami out to roughly a hundred miles.
What does a job cost?
It depends on the equipment, the contaminant and the access, so we will not throw a number at you over the phone without understanding the work. Describe the job and we will give you a real figure.
How soon can you look at it?
Send photos and a short description and one of the owners gets back to you. If you have a shutdown or a deadline, say so up front and we will tell you honestly whether we can hit it.
The comparison
The other ways to do this
- Hand scraping
Hours of work for an inconsistent result, with gouges where the blade slipped.
- Media blasting
Cuts into the substrate by design. Fine on structural steel, wrong on aluminum, plating, machined faces or anything with a tolerance.
- Pressure washing
Pressure pushes moisture past seals and into connectors, and then you wait. Panels and motors rule it out.
- Solvent and degreaser
Good at softening, bad at leaving. There is always a residue and always a drum to get rid of.
- Dry ice
Cold breaks the bond and the media vanishes. The substrate is untouched and there is no second mess to clean up.
What comes off
The deposits we see most
Most calls involve one of the following. The common factor is a bond between two things that should not be bonded.
- Resin and mold release
Cured process residue on a mold or fixture. The surface has to come out dimensionally unchanged, which rules out anything abrasive.
- Paint and coatings
Selective removal, layer by layer, on parts where media blasting would cut into the substrate.
- Salt and corrosion product
A constant in South Florida. Removing it without stripping the protective finish is the whole trick.
- Ink and printing residue
Dried ink on precision roller faces, cleaned without altering the cell structure that does the work.
- Food residue
Carbonized product build-up in a plant where neither standing water nor a chemical film is acceptable.
- Grease and oil
The soft film that holds dust and swarf against metal. It is what makes a part feel dirty long after it looks clean, and it comes off first.
- Carbon and soot
Heat-bonded black deposit. Because heat put it there, a sudden cold front is what breaks its grip.
How a job runs
What happens once you call
If you have not seen this done before, the process is worth reading once. Nothing below is hidden in a footnote.
- We look at access and containment
Hose run, compressor position, what needs masking, and where the contaminant is collected. For food and electrical jobs the containment plan takes longer to settle than the blasting does.
- We test a small area
An out-of-sight patch comes first so pressure and pellet size are proven before anything that shows. Soft alloys, older paint and bare metal each want different numbers.
- We blast, then clean up
Nothing is left of the pellet, so the only thing to collect is what was on your equipment. That collection is part of the work we quoted.
- You look before we pack up
We would rather you find the missed spot while we are standing there than a week later. Another pass on the day is the cheapest fix available.
- You describe the job
Send images if you can, they settle most of the questions. A wrong-tool verdict comes on that first call, not after the invoice.
What happens in your space
Cold surfaces are the one aftereffect. Depending on the piece that is either a few minutes of patience or some condensation while it returns to room temperature.
The rig needs compressed air, which the truck supplies. There is no hookup to find and nothing of yours to plug into.
Anything nearby that should not be touched gets masked before we start. That is quicker than explaining it afterward.
The media is solid CO2, nothing toxic and nothing left behind, but it pushes oxygen out of a closed room. Ventilation gets planned before the hose is connected.
Describe what you are dealing with.
Send the equipment, the location and a short description. Photos help. You will hear back from Giancarlo or Kenny, not a call center.