Okay... I learned something new about the pennies that are falling apart. Thank you kindly. So that eliminates the 1st penny, the 3rd penny, the 5th penny, and the 6th penny.
The 2nd penny (from the top;which is also the bottom penny) is full of die chips and/or blobs of metal; Not a thing to do with corrosion there. That is an error with the die right?
The 4th penny (from the top) has a stone or foreign object embedded into the coin; isn't that called a struck through error?
Randy