Permeability issues relating to sealing compounds
Permeability issues relating to sealing compounds
(OP)
Does anybody have any knowledge relating to Permeability issues relating to various sealing compounds. We have a problem with water ingressing into a small vacum on one of our components (Volume in the region of 1.7x10-5 m3) . Having carried out numerous investigations all evidence seems to point to ingress through the compound used to seal the volume.
I have tried to use Darcy's Law and various permeability values given by material suppliers to calculate the mass flow rate across the seal, for different materials, but i keep coming up with unrealistic answers. I was wondering if anybody had any similar experiences or advice.
Any advice greatly appreciated.
Thanks
I have tried to use Darcy's Law and various permeability values given by material suppliers to calculate the mass flow rate across the seal, for different materials, but i keep coming up with unrealistic answers. I was wondering if anybody had any similar experiences or advice.
Any advice greatly appreciated.
Thanks





RE: Permeability issues relating to sealing compounds
h
Timelord
RE: Permeability issues relating to sealing compounds
I don't have much experience with water ingress into evacuated cavities. I do have some experience with air ingress into water under slight negative pressure in elastomer tubing. In that instance, silicone was a nightmare. Viton worked much better.
Mike Halloran
Pembroke Pines, FL, USA