Issues regarding the selection of material for reactors used with water containing high levels of sodium chloride
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I am currently conducting a reaction under a pressure of 1 MPa; the reaction mixture results in an aqueous solution of 21% sodium chloride, with a reaction temperature of 60°C. I am using a 316L high-pressure reactor at present, and I have observed slight corrosion inside the reactor. If production is scaled up in the future, what type of material should be used for the reactor? Friends with experience, please recommend some options. I’ve heard that titanium is durable, but its price is very high.
Made of glass-lined steel, or titanium.
Currently, titanium is the best choice. Other options such as duplex steel can also be considered ； The temperature isn’t high, so a fluorinated lining will work as well.
A lining can be used, but it is not recommended to use materials like PTFE that tend to peel off.
A titanium-steel composite option is available; its price is much lower compared to that of all-titanium versions