NaOH and PVC

[Graham]

[thirsty]

[randut]

[Graham]

Thanks for that, that was exactly what I was wondering. Now, does anybody know a good site to order KOH from?

[hydroduke]

http://stores.ebay.com/Salt-City-Soaps_ ... eZL2QQtZkm

[Bob Boyce]

PVC is only a little incompatible with NaOH. The temperature and concentration used will greatly impact how long the two can work together. The PVC will get brittle and can crack easier, but will not usually just fail for no reason. This has been well known in the plumbing industry for a while. A side effect of using caustic chemical drain cleaners is this embrittlement, then the use of pipe snakes or clog busters can result in broken pipes with PVC. The main risk for booster builders using PVC is the lack of heat resistance, and with embrittlement the connection feedthrough points can crack and leak from the clamping pressure applied by those connections.

Bob

[olgageorge]

Hello everybody,

I am new here. Can someone please tell me what is the best thing to use to glue/fuse/weld/cement/seal plexiglass joints together with. I am trying to build a compact unit with 4 cells inside a 6" PVC pipe with plexiglass dividers. I plan on using KOH as caustic and 416 stainless as electrodes and want it to hold up for years and I am sure that it will heat up.

George

[olgageorge]

Sorry, that's 316 stainless.

George

[waterbard]

Try #4 scotch tape