Best polymer for corrosive fluid??

[Felipe28]

Hello,

I have 2 interesting questios, I believe, regarding polymer properties. I am designing a ball (pretty much like a basketball in size and appearance) to be used inside pressure vessels for certain corrosive fluids. The ball is inflated with air to a certain pressure in order to cushion extreme pressures in the pipeline (water-hammer). These balls will expand and contract according to pressure drops or pressure rises in water, respectively.

1) First question: These balls be in contact with certain corrosive fluids (under pressure) so I am looking for any or many polymers to be used as the external layer of the ball, so that it does not suffer from exposion to these special corrosive fluids. I have chemical properties of some of them, but I first ask this for any general corrosive fluid, not one in specific.

2) Second question: So far, I have been using polybutadiene as external polymer in the ball and butyl rubber as internal layer, but I believe there could be better choices in terms of lower permeability, as long as the other options can also be moulded and used as the external layer in a ball, for a reasonable cost (i.e, commercial polymers). The idea is to find also a polymer that can hold for a longer time the air inside the ball.

Regards

Felipe

 

[cloa]

1) Impossible to answer- you need to specify the fluid and temperature.

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[Felipe28]

Temperature is 20°C. I have some information:

- Sulfate concentration: 5.000 mg/l
- Sodium concentration: 18.000 mg/l
- Chlorure concentration: 18.000 mg/l
- Disolved solids: 65.000 mg/l
- PH: 6,0

Hope it works.

Felipe

 

[CoryPad]

Those conditions appear very benign, it seems like any elastomer will suffice.