plating, anodizing, & finishing Q&As since 1989
What are 'Active' Titanium Anodes for Hydrogen Generators
August 4, 2012
Q. I am with a government agency that is energy related. We have built and have had great success with hydrogen generators. We have been using 316L Stainless steel for our plates and even though we get good results from them, we can not get the life out of them that we would like.
We have experimented with nickel, (It lasts longer and does not corrode like 316L Stainless does, but it does not get the results that 316L does.
We want to try titanium next but are a little confused.
We know that the Cathode is the negative and the Anode is the positive. We also know that the cathode must remain bare titanium only, and that coating will come off during electrolysis.
When we run the anode as bare titanium the system does not work. It seems that the anode has to be "Activated". Can you describe "activated" to me please. There are a lot people using MMO processes but we do not to go that route unless there is no other alternative,
Thanks For your help in advance
designer - Tulsa, Oklahoma, USA
A. HI, as far as I know when Titanium is used as anode it get oxidized to TiO which will be formed on it's surface and is non conductive, nothing will happen or it will get heated up when higher voltage is applied. So Titanium anodes are MMO coated or platinized which is conductive and at the same time protect the base/substrate that is Titanium. I think there is no other alternative.
electroplater and thermal spray applicator - SHAH ALAM, MALAYSIA