I'm restoring an old coffee grinder and I want to give the grinder mechanism a nice zinc / silver coating.
But I read it is not safe for zinc to be in contact with acidic foods.
When I look at the pH, coffee's is 4.6 – 4.3 which is quite acidic: https://angelscup.com/blog/taste/coffee-acidity-flavor-ph-acid-reflux-and-low-acid-coffee/
Not sure if the zinc and coffee are likely to react in such a scenario. Should I maybe choose a silver plating?
Before cleaning with citric acid.
After cleaning with citric acid, Al foil and baking soda