I would like to ask the experts: Can Hastelloy C be used for the electrodes of electromagnetic flowmeters designed for high-temperature liquids containing sulfuric acid?
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In a chemical plant, the flow rate of sulfuric acid-containing water is being measured; the temperature is between 100–130°C. Can electrodes made of Hastelloy C be used for electromagnetic flowmeters in this application? What is the corrosion rate of Hastelloy C at high temperatures?
It depends on the concentration of sulfuric acid; it is recommended to use tantalum electrodes. Domestic HA-C electrodes won’t work, while those imported are too expensive!
It is recommended to use tantalum electrodes; you can take a look at the course on flow meters in the Haichuan learning platform
Rosemount’s guide to material selection for electromagnetic flowmeters: platinum-iridium electrodes are more suitable for this application
Tantalum electrodes or platinum-iridium alloys work well; PFA (Teflon) is suitable as the lining material, with a temperature tolerance of up to 180 degrees without any issues