What metal material is used for high-temperature concentrated sulfuric acid?

The stirrers for high-temperature concentrated sulfuric acid can be made from the following metal materials: 1. Stainless steel (such as 316L, 904L, etc.): Stainless steel possesses good corrosion resistance and can remain stable in an environment with high-temperature concentrated sulfuric acid. 2. Titanium alloys: Titanium alloys possess excellent corrosion resistance and perform well in high-temperature concentrated sulfuric acid environments, but they are relatively expensive. 3. Nickel alloys (such as Hastelloy): Nickel alloys are metal materials with good corrosion resistance, suitable for use in high-temperature concentrated sulfuric acid environments. The selection of appropriate metal materials should be based on specific operating conditions and requirements, including factors such as sulfuric acid concentration, temperature, and pressure. It should also be noted that concentrated sulfuric acid is a highly corrosive substance; therefore, in addition to choosing the appropriate metal materials, corresponding anti-corrosion measures must be taken, such as applying anti-corrosion coatings and selecting suitable sealing materials, to ensure the safe operation of the equipment. .

Isn’t there any suitable non-metal at such high temperatures?

For metals, HC276 can only be tried; high-silicon cast iron works, but it cannot be used for reactors.

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