Here is a copy of 4 pictures of real time aging of silver and copper.

The pictures are:
(1)  Silver Spoon - 10 years in the bag (taken out for trade shows - no polishing)
(2)  Silver Lead frame - 10 years - unprotected after 9 months is also in the picture
(3)  Copper Bus Bar (3 feet long in a torn bag - no corrosion after 7 years) - this bar is represented in the Bus Bar graph that shows corrosion after 7 days
(4) Integrated Circuit Chip (IC Chip) -- this is a combination of the silver lead frame (that forms the "feet" of the chip when bent) and tin solder attaching the "feet" to the circuitry (the black box) -- it is this multi metal point (where the tin solder contacts the silver) where you get the worst corrosion.  This is a combination of galvanic corrosion and atmospheric corrosion.  Galvanic corrosion occurs when you have two dissimilar metals in contact with each other.  The two metals set up an electrical connection -- like biting aluminum foil with fillings in your teeth, what you actually feel is electrical.  Intercept, being electrical in nature, actually blocks this electrical connection between the two metals and acts as a sacrificial electrode giving itself up instead of the metals reacting -- thus stopping or significantly slowing the galvanic corrosion.  Intercept needs to be in intimate contact for this two work though, but no other material on the market (except using zinc or an actual sacrificial circuit) can protect against galvanic corrosion. The unprotected IC chip corroded to this extent in the picture after 6 months -- the Intercept protected chip was 7 years.  Quite a difference.