35% sulfuric acid solution, 110℃ high temperature, what metal material should be used to resist corrosion?
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Looking for a 35% sulfuric acid solution at a high temperature of 110°C. What metal material should be used to resist corrosion and be used for heat exchange and evaporation of materials? I hope someone can tell me: lol
The above is taken from the corrosion data and material selection manual. The ideal material for storage tanks is carbon steel plated with enamel. The heat exchange tubes and tube sheets of the heat exchanger must be made of metal, which is a bit costly. Or simply consider it in terms of consumables, that is, replace the equipment once every 2-3 years with a design life (you can choose materials with relatively large amounts of corrosion). The electronic version of the manual is included, but it is rather vague. I have not found a clear version yet.
I found a picture online, I hope it will be helpful to you.
Regardless of the use of graphite, the heat transfer coefficient is a bit poor.
We have a waste acid concentrator here. The evaporator concentrator heating column tube is made of tantalum, and the shell is lined with enamel. It can concentrate about 65% of the acid to more than 83%. The temperature is about 150°C. It is designed by QVF. The original design pipeline and cooler are made of glass. Later, the outlet pipelines and coolers were domestically produced. The high-temperature pipelines were changed to be lined with enamel, the low-temperature pipelines were made of 316L stainless steel, the high-temperature heat exchanger tubes were made of tantalum, and the heads seemed to be enamel, too, and they seemed to be from Nanjing Stork Mountain.
Yes, much clearer, thanks for sharing.