I have my late grandpa’s silver spoon attached to my fridge with a neodymium magnet. What kind of chemical reaction causes that discolouration?
I have my late grandpa’s silver spoon attached to my fridge with a neodymium magnet. What kind of chemical reaction causes that discolouration?
Regarding the magnet contact area, the magnet was blocking most of the ambient air from the silver. Given that the spoon was where most spoons live anyways, the kitchen, consider all the food scents and vapors it has experienced on the fridge, that likely accounts for the sulphur oxidation others have mentioned.