Problem with the bottom tube material
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medium: Hydrogen fluoride, antimony pentachloride, trace chlorine, hydrogen chloride temperature: 90-100℃ pressure: 1.3-1.4MPa The current situation is that the bottom tube is made of PTFE on the inside and outside. However, after using it for a period of time, materials will enter the PTFE interlayer and the PTFE interlayer will be damaged. If it is disassembled and inspected, it is mainly due to problems with the inner and outer seals at the pipe mouth. I wonder if there are other materials that can withstand such a corrosive environment. Are Hastelloy and Monel feasible? Is it difficult to weld? I also ask the great gods to give me some advice, thank you.
I don’t know about the process, but I’ll see if it can be made of PPR and other plastic materials~
This post was last edited by mygod2012 on 2018-11-22 09:19. In this working condition, PTFE is enough. If the material penetrates through in a short time, it is probably because the PTFE material is not good. Buy imported ones
It is recommended to use nanocomposite emulsion products for anticorrosion
In theory, this working condition should be no problem. Is there stirring in the tank?
The bottom pipe section is made of non-metallic materials---PPR, PTFE, etc.
Graphite cannulas can be used without stirring.
Hoses or hard pipes, hoses can be made of pure tetrafluoroethylene, hard pipes can be made of graphite impregnated with plain ethylene.