Do you guys know if there is paint to protect copper from corroding and at the same time retain conductivity? Thanks!
No such low resistance ( under 1 ohm ) paint existed. A conductive paint with resistance about 50K ohm is existed for anti static floor application.
Maybe a zinc paint will do the job. I believe zinc is a conductor (not as good as copper though) and is the most common paint for protection against corrosion.
Corrosion of copper most commonly occurs from electrolytic action between different metals and in the presence of water. Hot water services that have a copper tank, copper sheathing on boats (an old time antifouling method) etc., are typically protected by attaching zinc cathodes that will deteriorate before the copper does. They are much cheaper than replacing the copper. If you have ever had a copper tanked hot water service fail on you, it fails when the zinc has been consumed. It's usually a long rod attached to a plug right at the top of the tank. Most people don't even know it exists! There is no such thing as a conductive paint, and I question why you would need a conductive paint on copper anyway?
