What material should be used for this type of application?
Thread Content
In wastewater, dichloromethane is ≤4000 mg/L, methyl bromide is ≤100 mg/L, hydrogen bromide is ≤10%, and pH < 1. The temperature is 100-130°C; what material should be used under such conditions?
A steel-lined PTFE option is more appropriate. The halide ions from chlorides and bromides are highly corrosive to metal materials, especially stainless steel.
PTFE isn’t suitable for withstanding high temperatures; is enamel a viable option?
This post was last edited by qugd on 2020-11-6 at 18:45. There is now PTFE spraying, similar to that used in non-stick pans. In current thermal spraying processes for fluoroplastics and fluororesins, materials such as Teflon, PFA, and PVDF can be used for thermal spraying; some of these materials can withstand temperatures of over 150 degrees Celsius. You may not know much about fluororesin thermal spraying. I think it’s actually the enamel that might not be suitable at such temperatures, because once there are tiny gaps, hydrohalic acids cause rapid corrosion.