4 replies to this topic

[Jaydip]

Hello Everyone,
 

Glad to connect 
 

We are currently working with the storage and transfer of dilute hydrofluoric acid (50% by weight). However, we often face failures in equipment, valves, and instrumentation due to its highly corrosive nature.
 

I would be grateful if you could share your insights on how to handle such a corrosive fluid effectively, without compromising equipment integrity or product quality.

we  already use the PTFE coated  pipe line /valves/equipment.  

[breizh]

A Google search:

 

 

A 50% hydrofluoric acid (HF) solution is highly corrosive and reactive. It's compatible with certain materials for short-term use, but long-term exposure requires careful selection. Materials like Teflon (PTFE), Kynar (PVDF), certain high-nickel alloys (e.g., Hastelloy C-276, Monel 400), and some specialized graphites are suitable for HF vapor service.

 

Breizh

[breizh]

Hi,

Consider talking to worldwide suppliers like Honeywell international, Solvay, Daikin.

HYDROFLUORIC ACID 49% | Solvay

Breizh

[deft clay]

 Rubber Chemical Compatibility Chart.xlsx   148.65KB   3 downloads

 

Jaydip, I have a chart I've used for soft goods and material compatibility. This one says that Kalrez is the only suitable material for HF. As usual, verify anything you read in this chart through other resources and vendors!

 

 

Edited by deft clay, 20 June 2025 - 10:27 AM.

[Jaydip]

Currently, we use HDPE lining on equipment for storage, and for transferring, we use CS-PTFE lining. However, we still sometimes face failures, such as cracking of the HDPE coating. We want to upgrade our system further. If anyone has experience handling corrosive fluids, we would appreciate your feedback.