Rust

Cathodic protection and anodic protection?
Can you please give me a quick recap of what cathodic and anodic protection is? To be cathodic protection does it have to oxidize better than the other element?

also An iron object is plated with cobalt to protect against corrosion. Does the cobalt protect iron by cathodicc protection?

My answr is no because iron oxidizez better than cobalt and there the iron will corrode away first

See the first link for a recap. Materials with a more negative electrode potential will sacrificially protect materials with a more positive electrode potential, when connected to or plated upon them. Cobalt will not protect iron; the current will run the wrong way.