Materials of Construction
- Regarding whether brass was OK to use or not, I've had a wee look through
some of my books. It might be OK - as it is CORROSION resistant to
alcohols, beer & water up to 100C.
I'm not sure either way however regarding its toxicity. As with any
materials being used, its probably different too whether considering a
continuous or batch process. The infrequent use & regular cleaning &
drying of hobby stills is a saving grace compared to the rigours a
commercial setup demands.
Heres a complete list of the materials I found. Can anyone else advise
regarding toxicity/other issues that might make some of the OK's
Coulson, Richardson & Sinnott report that:
aluminium, aluminium bronze, brass, copper, gunmetal and bronze, high Si
iron, nickel, nickle-copper alloys, platinum, silver, stainless steel
(18/8, molybedenum & austenitic ferric), titanium, tantalum, zirconium,
nylon 66 fibre & plastics, PCTFE, PTFE, polypropylene, furane resin,hard
rubber, neophrene, nitrile rubber, chlorosulphinated polyethylene, silicone
rubbers, concrete, glass, graphite, porcelain and stoneware, and vitreous
are corrosion resistant to alcohols, beer & water up to 100C.
lead, mild steel (BSS 15), cast iron, tin acrylic sheet (eg perspex),
acrylonitrile butadiene styrene resins, rigidunplasticised PVC, plasticised
PVC, polyethylene (low & high density), polystyrene, melamine resins, epoxy
resin, phenol formaldehyde resins, polyester resins, butyl rubber &
halo-butyl rubber, ethylene propylene rubber, soft natural rubber,
polyethylene rubber, and wood
are not OK.