Completing circuit using salt water with no corrosion!

[AMD]

Hey everyone

 

For an engineering project, I am trying to complete an electric circuit using salt water but I don't want to loose my electrodes from corrosion (allow electrolysis to occur)! is this possible? I was thinking of using AC circuit with high frequencies.

 

I can change the type of salt in the electrolyte, the metals of the electrodes or the setup as you advice.

 

Thank you ..

[Sensei]

Gold, Platinum or Palladium metal, or clean Graphite, for electrodes should be used to produce Hydrogen and Oxygen. And not dissolve electrodes.

 

I am personally using Gold. But you have to use 24 carat Gold, not 14 nor 18 as these have just 58.3% and 75% of Gold.

Edited December 27, 2014 by Sensei

[AMD]

Gold, Platinum or Palladium metal, or clean Graphite, for electrodes should be used to produce Hydrogen and Oxygen. And not dissolve electrodes.

 

I am personally using Gold. But you have to use 24 carat Gold, not 14 nor 18 as these have just 58.3% and 75% of Gold.

 

thanks for the fast reply

I don't want to change the chemistry of the electrolyte (mainly don't want to miss with the ph level), is using 24 carat Gold will decompose the salt water (KCl, NaCl etc)? what about when using AC current with Gold or clean Graphite as you mentioned?

[Moontanman]

Hey everyone

 

For an engineering project, I am trying to complete an electric circuit using salt water but I don't want to loose my electrodes from corrosion (allow electrolysis to occur)! is this possible? I was thinking of using AC circuit with high frequencies.

 

I can change the type of salt in the electrolyte, the metals of the electrodes or the setup as you advice.

 

Thank you ..

 

 

May I ask what you are doing with the salt water or is it an exercise in corrosion study...

[AMD]

 

 

May I ask what you are doing with the salt water or is it an exercise in corrosion study...

 

it is a group project assigned in engineering fundamental course

[pzkpfw]

Can a sacrificial metal be used to protect the electrodes?

[AMD]

where and how should I connect the sacrificial rode, as it is AC?

I kind of got that, but how can I prevent from the change in the electrolyte

if you mean using DC, then electrolysis will occur and the chemistry of the electrolyte will change and I want to avoid that if possible

Edited December 28, 2014 by AMD