I had a phone call yesterday, which has left me stumped and I figured it might be a good question to ask on here.
We have a customer who is looking for a material that is going to be submerged into water for it’s lifespan, but also be exposed to calcium while submerged in the water as well. This customer is okay if the submerged items do break down overtime, as he could just be able to replicate them again with a printer, however I am stumped as to what material would be the best for this.
Polypropylene (PP) would work well, it is a pain to print. Ultrafuse
PETg is hydroscopic but is still rated as water resistant. Salt is super corrosive but it is electrically related I am not sure salt would matter. So maybe?
ASA would be my first choice personally, reasonable to print, not really expensive and good resistance to many chemicals and environments. I have had it as a bearing in a very alkaline solution PH12. It has been in use for 16 months or so.
I would suspect no 3d print will last for really long times but years for sure.
What I would try would be TPU. Ninjatek Armadillo TPU to be specific. I don’t know how it compares to above mentioned materials, but it is a tough material that is supposed to be pretty chemical resistant.