Copper naturally oxidizes, and some find the look appealing while others would prefer copper keep its shiny finish. In order to stop copper corrosion you need to stop the air from coming into contact with the copper. Here are some ways to protect your copper.
By using some kind of grease, such as a layer of Vaseline, over the copper you can prevent copper corrosion. This isn’t suitable for all objects made of copper, but where you have copper pipes in the basement, for example, it can prove to be an excellent solution. You do need to make sure that you cover all the pipe in the grease so you have an airtight coating over the metal for this to work.
Employing a paint sealer to keep air off the copper is another good way to stop copper corrosion. This is a solution that will work with copper objects, although in this case it will be for display objects rather than anything to be handled regularly.
With most copper objects, regular cleaning using a salt or vinegar and baking soda paste is the answer. This will prevent any type of corrosion happening to the copper as well as keeping the metal shiny. Clean monthly to achieve the best results. This takes time, but if done thoroughly copper corrosion will never be a problem.