Seek help: material selection for dilute sulfuric acid storage tanks
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This post was last edited by Pei Qinghua on 2018-1-19 at 11:22. It relates to a 200m3 storage tank; the medium is dilute sulfuric acid (65–75%), the operating temperature is 25–60 degrees Celsius, and the pressure is at atmospheric level. What material is better? Composite tanks with PP lining made of fiberglass are not considered.
FRP+PVC is indeed the most suitable.
I’ve used FRP+PVC; there have been two instances of leakage at the bottom, and it’s difficult to deal with this issue – the interlayer cannot be fixed
Manufacturers generally don’t dare rely on FRP processing methods, as leaks will surely occur within a year.
We used 316L under conditions similar to those you mentioned; it’s been 3 years and so far there have been no problems
Steel lining F4, no problems for 10 years
When using a steel lining of F4 grade, it is necessary to pay attention to the surface preparation of the steel, the material grade of the F4 sheet, the degree of surface sodium treatment, the choice of adhesive, the selection of welding materials and the welding process, as well as the post-welding treatment. There are quite a number of manufacturers producing this at present; the sheets available are both domestic and imported.