Materials selection for resistance to sulfuric acid corrosion
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With a sulfuric acid content of 1600PPM and a temperature of 120~125 degrees Celsius, which metal material is suitable?
Is it a pipeline, a heat exchanger, or a tower-type device? Pipes can be made of high-silicon cast iron; for heat exchangers, graphite heat exchangers should be used, and graphite towers can also be chosen for tower-type equipment.
For container types, where the pressure is relatively high, graphite is not suitable.
Polytetrafluoroethylene-based anti-oxidation and corrosion coatings can be considered as a solution; they can withstand temperatures up to 250°C. They are quite convenient for pipeline installation, especially for pipelines that have not yet been installed, as they can be applied either by pouring or by brushing.
What is the pressure? There are specialized graphite pressure vessels, suitable for both Class I and Class II, with a design and manufacturing grade of A4. -