Stefan Trethan wrote:
>
>
>>>Note that this brew attacks some plastics - I had left 2 air "stones"
>>
>>:( is PET (or LDPE) OK?
>>
>
>
> For some time (months) yes, see my other post, the HCl will form crystals
> on the outside in a year or so. glass is better.
>
> ST
>
Nylon is a commonly used plastic that doesn't survive in acid.
Identifying plastics can be done with the burn test. To check if nylon
burn some of it and note the smell, color of smoke and the effect on the
plastic as its burning. Then burn your unknown sample. Nylon burns with
white smoke, and bubbles while on fire.
I once used some irrigation plastic hose fittings to carry sulfuric
acid. After a few weeks the fittings disintegrated leaking 20 liters of
acid on the floor. I later learned they were nylon, so I went shopping
with a cigarette lighter and burned various brands of hose fittings
until I found ones that were polypropylene.
Adam