Polypropylene Laboratory Base Cabinet for an Aerospace Laboratory: SpaceX, Hawthorne
SpaceX needed corrosion-proof storage under a laboratory work surface at its Hawthorne, California facility. Labs USA supplied a 48 inch wide, 36 inch high polypropylene base cabinet built for acid and solvent service.
The Situation
Aerospace laboratories run chemistry that punishes furniture. Cleaning and passivating metal parts involves acids. Non-destructive testing uses penetrants and solvents. Propellant, coolant, and water chemistry analysis means routine handling of concentrated reagents at a bench. Painted steel casework handles most laboratory life very well, but there are specific locations where it does not: directly beneath an acid work station, inside a wet bench, or anywhere a corrosive drip is not an accident but an expected daily event.
In those locations painted steel starts to fail from the inside. A scratch or a chip in the finish exposes the substrate, an acid film sits in the corner of a cabinet interior, and within a year or two there is rust creeping under the paint on the shelf and door edge. The cabinet still functions, but it is no longer clean, no longer easy to decontaminate, and eventually it is a maintenance item in a room where maintenance access is expensive.
The requirement at Hawthorne was narrow and specific: one 48 inch base cabinet position under an existing work surface, in a spot where the storage had to be indifferent to acids rather than merely resistant to them. It was not a fit-out. It was the right cabinet in one place, ordered by people who already knew what the room needed.
The Solution
Labs USA supplied a polypropylene laboratory base cabinet, 48 inches wide and 36 inches high, in the standard base cabinet position under the work surface. Polypropylene is not a coating or a liner; the cabinet body, doors, and shelf are the material itself, so there is no finish to chip and no substrate underneath to corrode.
Polypropylene earns its place in a laboratory for three reasons. It resists almost the entire range of laboratory acids and bases, including hydrofluoric, nitric, hydrochloric, and sulfuric acid, at concentrations that strip painted steel. Its seams are heat welded rather than fastened, so the interior is a continuous non-absorbent surface that can be flooded, wiped, and decontaminated without water getting into a joint. And it does not off-gas or shed, which matters when the cabinet sits in a room where trace contamination affects results. Its limits are equally clear: it is not for flammable liquid storage, which belongs in a listed flammables cabinet, and it is not for high heat.
A base cabinet at 36 inches high with a 48 inch clear width is the standard laboratory bench module for a reason: it accepts full size carboys and reagent bottles upright, matches standard work surface heights, and lines up with adjacent steel casework so a run stays visually and dimensionally consistent. Mixing a plastic cabinet into a steel run is normal practice and is how a well specified laboratory handles a corrosive zone, rather than building the whole room out of the most expensive material.
That mixed approach is the useful lesson from a single-cabinet order. Specify laboratory cabinets by what happens directly above and inside them: painted steel for general storage, polypropylene under acid stations and wet benches, stainless steel where cleanability and heat matter, listed flammables cabinets for solvents, and vented units where storage needs to be tied into exhaust. Browse the wider laboratory casework range to see how those materials combine in one bench line.
Features
Advantage
The argument for buying the correct material in one location instead of the cheapest material everywhere is straightforward once you price a replacement. Swapping a corroded base cabinet in a working laboratory is not a furniture cost. It is the cost of clearing the bench, disconnecting services if they run through it, taking the work surface load off, removing and disposing of a chemically contaminated unit, and putting the room back, all inside a schedule that belongs to somebody else’s project.
There is also a contamination argument that matters specifically in aerospace and semiconductor work. Corroded steel sheds particulate and oxide, and a rusting cabinet interior is a particle source in a room where particles are tracked. Polypropylene does not corrode, does not shed, and does not support the kind of surface chemistry that turns a storage cabinet into a contamination problem.
- Chemically inert throughout, not a coated or lined steel body
- Rated for the acids that destroy painted steel casework
- Continuous welded interior that decontaminates properly
- Dimensionally standard, so it drops into an existing bench run
- No particulate shedding or corrosion products in a clean room
- Available as one cabinet, on a normal procurement cycle
Labs USA quotes one cabinet with the same specification questions as a whole laboratory: what is stored, what is used directly above it, how it gets cleaned, and what the adjacent casework is. That conversation is the difference between a cabinet that lasts the life of the building and one that becomes a work order. See laboratory furniture for the full range of bench components.
Benefits
The immediate benefit is that the corrosive zone in the room now has storage that matches the chemistry happening above it. Acid can drip, be wiped up, and leave no consequence, which is not true of a painted cabinet in the same position.
The maintenance benefit is the absence of a future project. This cabinet does not have a corrosion failure mode, so it does not generate the removal and replacement job that a steel unit in the same place eventually would, in a room where taking a bench out of service is the expensive part.
The procurement benefit is proportionality. One cabinet solved one problem. There was no need to re-specify the whole bench line in plastic, no project, and no downtime, and the new unit still lines up with the casework it sits next to.
Mixed materials in one bench run: steel where steel is fine, polypropylene where the chemistry says it will not be.
Return on Investment
The return on a single specialised cabinet is a straight comparison against the alternative. A painted steel base cabinet in an acid service position is cheaper to buy and, in that specific location, has a service life measured in a few years rather than decades. Replacing it later costs the new cabinet plus the labour and downtime to change it out, which is the larger number.
There is a second, quieter return in cleanability. A welded plastic interior can be fully decontaminated, which means a spill is a fifteen minute clean-up rather than a question about whether the cabinet is now contaminated. In an audited environment that documentation matters.
Because the cabinet is a standard module, it also protects the value of the rest of the bench. The correct unit in the corrosive position keeps the adjacent steel casework out of the splash zone, which extends the life of everything around it.
Project Process
Enquiry
SpaceX contacted Labs USA through the website for corrosion resistant under-counter storage at its Hawthorne, California facility.
Specification
We confirmed the bench module, the required 48 inch width and 36 inch height, and that the position required a chemically inert body rather than coated steel.
Quotation
One polypropylene base cabinet was quoted with freight as a single line item.
Order
The cabinet was released to production on approval of the configuration.
Delivery
The unit shipped direct to Hawthorne and set into the existing bench position under the work surface.
Follow on
Labs USA remains available for additional cabinets, work surfaces, fume hoods, and extraction as the laboratory expands.
Supplying Laboratory Casework in Hawthorne and Southern California
The aerospace corridor around Hawthorne and El Segundo runs some of the most demanding laboratory chemistry in the country in buildings that were never designed as laboratories. Benches get added into manufacturing space, analytical work moves next to production, and casework has to be specified per position rather than per room. That is exactly the environment where mixed material bench runs make sense.
Labs USA supplies aerospace, defence, and manufacturing laboratories across Southern California from Salt Lake City, and quotes single items as readily as complete fit-outs. Laboratory cabinets, casework and work surfaces, laboratory and balance tables, fume hoods, and extraction arms can be specified together so a bench ends up consistent.
If you have one position in a laboratory that keeps corroding, call (801) 855-8560. Tell us what is used above it and we will specify the material that survives it.
Frequently Asked Questions
Why use a polypropylene cabinet instead of painted steel?
Polypropylene is chemically inert through its whole thickness, so acids and caustics that would chip and undercut a painted steel finish have no effect. It is the correct choice directly under acid work stations and wet benches.
What chemicals can a polypropylene laboratory cabinet handle?
It resists the common mineral acids and bases, including hydrofluoric, nitric, hydrochloric, and sulfuric acid, at laboratory concentrations. It is not intended for flammable liquid storage or high heat.
Can polypropylene cabinets store flammable solvents?
No. Flammable liquids belong in a listed flammable storage cabinet. Labs USA specifies those separately alongside plastic and steel casework.
Will a plastic cabinet match the rest of my steel casework?
Yes. Standard base cabinet modules share dimensions, so a polypropylene unit drops into a steel run at the same height and depth and lines up under a continuous work surface.
What size was supplied on this project?
One base cabinet, 48 inches wide and 36 inches high, in the standard under-counter bench position.
Do you supply single cabinets or only complete laboratories?
Both. This project was a single cabinet. Labs USA also furnishes complete laboratories with casework, work surfaces, fume hoods, and extraction.
How is a polypropylene cabinet cleaned and decontaminated?
Seams are heat welded into a continuous non-absorbent surface, so the interior can be flooded, wiped, and decontaminated with no joints for residue to sit in.
Is polypropylene suitable for cleanroom laboratories?
It is widely used in clean environments because it does not corrode or shed particulate the way a failing painted steel finish does. Material selection should still be confirmed against the room’s cleanliness class.
One Cabinet Position That Keeps Corroding?
Labs USA specifies casework by position: painted steel, polypropylene, stainless, flammables, and vented storage, shipped nationwide.