Electrode material for electrolysis

[rmayer]

We are putting 30Kppm+ brine through an electrolysis cell and are losing the platinum off of the Pt plated Ti electrodes rapidly on the anolyte side. We experimented with a graphite electrode and ran into some design problems with the porosity and erosion due to the tar/pitch that holds the particles in pressed/isomolded form. We want to start playing with some of the vacuum impregnated/corrosion enhanced graphites. I have heard of PTFE impregnated and another group that was using a phenolic impregnated graphite. Any suggestions?

 

[dogtop]

Brine composition?
Electrolysis temperature?
Current density?
Cell voltage?
Have you heard of Pourbaix diagrams?
Check ALL of those out.
HTH

 

[rmayer]

Brine Composition: NaCl or KCl, corrosion has been the same

Electrolysis temp: Inlet brine temp is approx 15C

Current Density: Approx 0.1 Acm^-2

Cell Voltage: Approx 9V

I haven't heard of Pourbaix diagrams but am checking them out.

THX

 

[dogtop]

Check these out:

http://www.denora.it/

http://www.eltechsystems.com/

http://electrochem.cwru.edu/ed/dict.htm

http://corrosion-doctors.org/Modules/mod-prevention.htm

http://www.nace.org/content.cfm?parentid=1001&currentID=1001&CFID=214159&CFTOKEN=41645451

http://www.htw-germany.com/?gclid=CIWvzcO795QCFQxzHgod8FTvrg

HTH