Selection of flowmeter lining for low-concentration sulfuric acid
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The wastewater currently contains 12 g/L of sulfuric acid, with a temperature ranging from -30°C to 30°C and a pressure of 800 kPa_g. Is it acceptable to use polyurethane or hard rubber in this case? Due to certain constraints, it is not possible to use other types of linings. I seek guidance from all the experts! ! !
Rigid glue has poor low-temperature resistance; it is recommended to use a soft, acid-resistant adhesive sheet as a lining.
Due to certain reasons, there are only these two types of linings available for this model; what about polyurethane?
Some types of polyurethanes also have poor low-temperature resistance.
Polyurethane can be used under the conditions you mentioned. However, the pressure must be positive
There is another material that meets the conditions you mentioned; the key issue is that its price is a bit higher. It is wear-resistant and heat-resistant, and its performance in various aspects is quite good. Those with technical expertise can communicate with me regarding this
Neoprene, fluororubber, or EPDM can all withstand this concentration of dilute sulfuric acid.
Polyaniline anti-corrosion coatings perform well in 33% dilute sulfuric acid. The pressure resistance test results for these coatings in the laboratory are 35 megapascals, and there are no issues with temperature either; therefore, a hanging-slab test can be conducted.