High Temp Sulfuric resistant materials
High Temp Sulfuric resistant materials
(OP)
I am looking for a material suitable for use to make an agitator in a pressure vessel operating at 4 bar, max 150oC, submerged in boiling H2SO4 at 20% concentration. The vessel contain abrasive clay slurry at 30% solids con. Would appreciate some recommendation on a suitable material. Currently we use a lead lined agitator but are trying to phase out the lead in our product.
Thanks for the input.
Thanks for the input.





RE: High Temp Sulfuric resistant materials
Metals Handbook, 9th. Edn., Vol. 13, Corrosion, pp. 1152-1153, and the corrosion resistance chart from Astro-Cosmos http://www.astrocosmos.com/pdf/chart.pdf
both indicate that you can safely use zirconium or tantalum
(unalloyed) at the sulfuric acid boiling point.
RE: High Temp Sulfuric resistant materials
RE: High Temp Sulfuric resistant materials
However, there is a hast-C valve at the bottom of the vessel.
RE: High Temp Sulfuric resistant materials
if the valve is holding up, then you have a starting point for your materials selection, but you may need some hardfacing. Hast.C(C-276) valves are generally cast and are a slightly different from the plate and bar stock you'd be using to fabricate an agitator.
RE: High Temp Sulfuric resistant materials