Are composites corrosive to Co2 gas? I wanted to make a connector for a soda maker I have. The entire thing is made of plastic but not sure if composites will react making deadly poison with Co2 like brass and other metals will. Any idea?
what makes you think C02 reacts with brass? Co2 is an inert gas so it should be pretty non-reactive. It definitely won’t react with carbon or epoxy in any normal circumstance.
My mistake, it reacts with copper. There was a warning using copper fittings will cause some kind of health risk. So there would be nothing different with composites from plastics, they would never decompose or anything when wet?
Copper and co2? hmm…
composites are plastics. Epoxy is especially good and resistant to most things, but not UV. You should be fine but, epoxy is not ‘food safe’. I’ve searched and found some food safe epoxies but they’re a special breed. The aluminum cans that food is put into, or the aluminum water canteens, are coated with this stuff. So not sure what epoxy you’re using or if it touches food? IF it’s just c02 I’d say it’s probably ok. Or use aluminum?
Whatcha wanna do though? Make a new SodaStream case? The CO2 doesn’t touch the case. Keep the stock plumbing intact. Or do you want to rredo the plumbing? If so, why and what do you plan?
Remember, there is a buttload of CO2 in the air around us…Composites are also meant for highly corrosive materials, because metal can degrade.
Sammy is right though, if you plan on using composites that interact DIRECTLY with food based items, make sure it is FDA approved resin. A case for a sodastream is not in direct contact with the water, or CO2, but making the bottle connector out of carbon and resin is.
EDIT: just reread your post. you want to make a connector. which one? You need to design this VERY VERY WELL if it’s under pressure!!! Else…BOOM!
What I wanted to do was make a connector that goes from the hose, with standard threading, I would hook up to the special sodastream fitting, some kind of proprietary threading, that their co2 bottles screw into. That way I can use my own co2 tank. My biggest problem now, which I didn’t think of, is some kind of component to activate the spigot thru the part between the sodastream thread and hose connector, the deal you press down to send c02 into the bottle.
Hmm. Yeah, can’t help you there. Maybe take an old SodaStream tank, weld on a fitting, and then attach your own CO2 tank to it? Not sure what the rpessure rating is on the SS tank, but I doubt you need more than 50 psi at a time.