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material for construction for brine
2

material for construction for brine

material for construction for brine

(OP)
Can someone recommend storage tank materials that are compatible with 12% brine at 80degC? Would stainless steel 304 be a suitable material?

RE: material for construction for brine

Making an assumption regarding the contents of the "brine," the answer would be no. Typical materials are lined carbon steel and FRP.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

RE: material for construction for brine

Since this is a storage tank I would guess that this is exposed to air, and in that case SS would be very expensive to move to a high enough alloy to resist corrosion at 80C.
Lined CS is the most common. There are high temp multi-layer epoxy lining systems used for this type of application.

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P.E. Metallurgy, Plymouth Tube

RE: material for construction for brine

(OP)
Thank you SJones and EdStainless for your reply. Anyway I am curious about the corrosion resistance of stainless steel 304 and 316L against 12% brine solution at 80degC. May any of you assist?

RE: material for construction for brine

When you say "brine", what do you mean? 12% NaCl in water and nothing else? Or is there dissolved gasses? Will the headspace be exposed to air? Whats the pH? Etc. Etc. Etc.


Mind, there really aren't many answers to the above that would make a 300 series acceptable in a concentrated brine solution at 80 c. ClSCC is a very real possibility at that temperature.

Nathan Brink

RE: material for construction for brine

I'd go one step further and say that there are NO conditions which would make 300 series stainless steels acceptable under these conditions, other than operation 1 day per year with a total disassembly and clean-out between operations perhaps.

RE: material for construction for brine

The only applications where a 3xx stainless would be in a reducing environment (No oxygen) and pH >10.
At pH=8, T80=C 316L will have a limit of about 200ppm Cl open to air.
A 6%Mo superaustenitic would not handle 12% NaCl at 80C.
You would have to go to a Cr-Mo-Ni alloy such as C22, 686, or 59.

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P.E. Metallurgy, Plymouth Tube

RE: material for construction for brine

If its a non-pressurized container some sort of plastic may work (GRE/GRP)

Best regards, Morten

RE: material for construction for brine

(OP)
Thank you Nathan, molten metal, EdStainless and Morten

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