Put them in a gatorade bottle with soapy water with a touch of white vinegar. Shake the crap out of it, then rinse them well. Lay them out to dry. When dry tumble them. The wash will kill whatever caused the corrosion. The tumbler will smooth them out.
After that I would say if you load those do not leave the rounds loaded for a long time. Load thme and shoot them up you should get a few good firings out them.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.