Error coin or acid dipped?

I found this coin while roll searching.The weight on this coin is 25 grams and seems more heavier than the normal zinc copper coated coins,that weighs in at 24 grams.

 

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Looks like environmental damage. Zinc cents look like that after spending time outside.

 

PMD I think. I see a lot of damaged Zincolns that look like detergent or fabfic softener may have reacted with the plating.

 

I never heard of that happening..Wow!

 

I think you lost a decimal points. Spec on the copper plated zincs is 2.5 grams +/- .1 grams so all of those are within spec.

 

Looks a mess definetly pmd

 

Pmd