I've always read that a patina forming on carbon blade steels is a protective coating against other types of corrosion. I know almost nothing about corrosion. Actually rust is the only work I think I've ever used referring to corrosion until I heard of patina. My question is how much protection does a patina provide?
Example: I disassembled my Bradley Folder and forced a patina on the entire blade including tang. This of course means inside the hole, around the tang, everywhere seen and not seen when the knife is assembled. So, if the patina protects the steel, how much protection is there? Can the amount of protection be measured? I've always assumed we should also do whatever we would normally do to fight rust. If my M4 blade has a patina on the tang can I stop using tuf-glide as a corrosion fighter and only concern myself with lubrication?
Anybody know about this? I want my grandson to enjoy my knives so I'll continue doing whatever I can to protect them. So I guess this question is mainly out of curiousity. Or, with a patina on the blade and tang both, can I do nothing else to fight corrosion and use the GB every day on a salt water fishing boat?