Material selection
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I have a question: There is a reactor containing chlorine, HF, dichloromethane, and antimony pentachloride. The operating temperature is 100 degrees, and the pressure is 1.4 MPA. The material used is Q345D, but corrosion is severe in this environment. We are considering switching to Hastelloy C276 – I’m not sure if that’s possible. Those who have experience in this area could share their insights. Thank you, forum member victory:
Fluorinated lining material VX: L13770428808 AC
Fluorine-lined for 1.4MPa? It’s not good to relate everything to one’s own product
It’s definitely possible, but the cost is relatively high. Reactors are generally pressure vessels, and for such materials, it’s necessary to create design drawings and carry out calculations; it’s not enough to just make changes on your own
It’s likely not a big problem; you can first conduct a corrosion test using test blocks
I’m not sure if the original poster has found suitable materials. Sandvik has developed a new type of super austenitic stainless steel that can replace C276 in certain applications, and its price is only half that of C276. We can communicate if needed, thank you!
Is the medium containing water? If moisture content has a significant impact on the material selection, even trace amounts of water can have a considerable effect.