Tiny White Spots On Zinc Coin - Coin Community Forum

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Author	Replies: 5 / Views: 2,181
chronos Pillar of the Community Lebanon 502 Posts	Posted 08/09/2021 04:37 am Hello is the tiny white spots on zinc coin are rust ? does this make it a detail coin if submitted to NGC or PCGS? In the photo they appear as dark spots and they are present on this side only. Edited by chronos 08/09/2021 04:52 am Report this Post to the Staff

John1 Moderator United States 56855 Posts	Posted 08/09/2021 04:45 am A photo would help. John1 Report this Post to the Staff
Sap Moderator Australia 16806 Posts	Posted 08/09/2021 06:41 am Yes, white spots on zinc are corrosion; most corrosion byproducts of zinc are white in colour. It's not technically "rust", as technically only iron and steel "rusts". Severe corrosion on zinc coins is usually called "zinc rot", but this doesn;t look quite bad enough for that term to apply. I'm afraid I don't know how much corrosion the TPGs tolerate on zinc coins. Zinc coins are highly prone to corrosion. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 08/10/2021 01:24 am Yes the white spots are corrosion, zinc oxide is forming. Report this Post to the Staff
chronos Pillar of the Community Lebanon 502 Posts	Posted 10/20/2021 2:17 pm I have seen recently a coin with bigger spots and more deep ones getting a numerical grade with PCGS. Edited by chronos 10/20/2021 2:35 pm Report this Post to the Staff
just carl Bedrock of the Community United States 20753 Posts	Posted 10/21/2021 09:31 am Sorry Sap but Rusting is really just a metal reacting with Oxygen. Almost all metals react chemically with Oxygen. Rusting is just sort of a slang word for Oxidation of metals. Report this Post to the Staff
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