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Blisters in Rubber Lined Tanks.

Blisters in Rubber Lined Tanks.

Blisters in Rubber Lined Tanks.

(OP)
I'm in the Rubber Lining business and  occasionally meet rubber lined steel  tanks where the lining has  blisters which  steadily grow - - - saw one once as big as half a football - - they contain what seems to be water   The rubber lining does not have any defects and the water  feels slightly pressurised  causing the lining to "inflate"     There is never  any corrosion damage to the steel wall at the point of these blisters - - I guess there is no oxygen in the "water"
My questionis,  how does the water get through the liining.
( the blisters we saw this week were in an Anion vessel - - temperature only slightly above ambient and pressure was trivial.
the huge ones we saw last month were in a flue gas scrubber  where brine  washes the gasses at about  35 degree temp.
Please has anyone an explatation of what is happening
(Once heard the word "Osmosis"  and some people call it the "cold wall effect")
Cheers    CM

RE: Blisters in Rubber Lined Tanks.

While polymers, plastics and rubbers etc. can pretty much contain many substances, I think unlike metals they are nevertheless "permeable" in various normally slight degrees to various liquids and gases/vapors etc.  You might want to search for such properties with key words "permeability", "permeation", etc.  

RE: Blisters in Rubber Lined Tanks.

If you have a pin hole in your rubber lining you get a blister on the rubber lining due to steel products corrosion and water entrance underneath. This is not unusual in Anion Vessels.

I would recommend you to perform electrostatic tests to see if you have sparks in your lining, if so, corrosion will increase in those points.

Cheers

Luis

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