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Yes, sort of. Soda lime won't react [very quickly] w/ Al until after it has reacted w/ CO2 or absorbed H2O. After that, yes, it will react. The reaction of the carbonates (lime reacted w/ CO2) would most likely be slow enough to be neglected, especially when compared to hydrated or wet lime. At temperatures below ~100F, the reaction is very slow, probably only enough to tarnish whatever aluminum it is in contact with. BUT, I don't know how warm/hot canisters get in use. . . In a short reply from Rich Pyle (Anhydrides vs Hydroxides), he stated that the reaction of CO2 w/ scrubber was exothermic enough to make the breathing gas "uncomfortably warm." Sounds like >= 100F to me. The reaction of Aluminum foil with a solution of Draino (Sodium Hydroxide) is one method of making hydrogen for lab demo's or at home for filling balloons. It's also a great way to make a somewhat dangerous mess. I'd at least not use Al in my canister. Look for some stainless steel mesh, or plate, and drill lots of little holes in it. That's how Dri-rite does it in their drying canisters. Lee On Tue, 13 Jan 1998 22:00:22 +0100 "Atle Aamodt" <aaamodt@on*.no*> writes: >I saw a paper claming sodalime (Calcium hyroxide, alkali hydroxide) >and >aluminum will react and produce hydrogen. If so, it's rather stupid to >use >in a RB. > >Anyone familiar with this ?? > >I'm hoping to use a thin aluminum mesh in my scrubber canister. > > >---------------------------------------------------------------------------- > >Atle Aamodt > > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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