Would gold conductivity electrodes be as good as carbon, platinum black etc?

[My name is Bob]

Hi, I want to make a conductivity meter (for salty water) that has to last
a long time.

I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.

I was wondering if a PCB with two gold plated contacts on it would suffice?
It seems to me gold is unreactive, with only a very small AC current between
the two contacts it won't corrode will it?

I know I could buy one but I want to make it myself.

Thanks.

 

[Robert Baer]

Hi, I want to make a conductivity meter (for salty water) that has to last
a long time.

I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.

I was wondering if a PCB with two gold plated contacts on it would suffice?
It seems to me gold is unreactive, with only a very small AC current between
the two contacts it won't corrode will it?

I know I could buy one but I want to make it myself.

Thanks.

You are correct in that gold does not corrode, but be advised that
current between electrodes means that some kind of compound gets
"plated" on at least one of the electrodes, thereby contaminating them.
Also, the plating on copper traces may not completely cover the
copper (especiallyu the edges); that makes for an electrochemical cell
right there (possible problems in measurements and electrode lifetime).

 

[My name is Bob]

Thanks again Robert.

 

[neon]

Plating will never work. you need gold 24 carats too as wires anything else will corode.

 

[mark krawczuk]

hi, as far as i know , silver has better conductivity than gold , but the
problem being is that silver tarnishes easy, whereas gold doesnt , so gold
is the next best choice.
mark k

 

[mark krawczuk]

hi, as far as i know silver is a better conductor than gold , but silver
tarnishes easier than gold .
mark k

 

[Jakthehammer]

hi, as far as i know silver is a better conductor than gold , but
silver
tarnishes easier than gold .
mark k

I recommend using Chromium or stainless with lots of Chromium.
Conductivity is as good as Gold, cheaper long lasting in solution like salt
water. Just remember, Do not waste your money on Hydrogen Scam.

Jack.