Metal alternative to tantailum for strong acid high temps

[mrtangent]

Can anyone recommend an alterantive metal to tantalim for boiling mixtures of HCl from 1 to 20 %.

We currently use various grades of hastalloy but they tend to suffer corrision and fail within 2-3 years life span.

Obviously you can use plastics but the tend to not be as strong. Our temps go up to 180°C and in some applications to 230 deg C

 

[Metalguy]

You're getting close to needing Au or Pt!

 

[CoryPad]

I believe Zr can be used in these conditions - you can get information from Wah Chang at:

http://www.wahchang.com

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[JimMetalsCeramics]

You might try pure Nb. How about a ceramic?