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1942 Three Pence. Is This A Different Metal Than Normal?

 
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New Member

United Kingdom
10 Posts
 Posted 01/23/2021  03:37 am Show Profile   Bookmark this topic Add Coin2009K to your friends list Get a Link to this Message
Any constructive ideas? The coin has the same toning all over with detail so don't think it is rust. Possibly struck on an alternative metal?


Valued Member
Netherlands
83 Posts
 Posted 01/23/2021  03:52 am  Show Profile   Bookmark this reply Add Eligius to your friends list Get a Link to this Reply
From the pitted surface it is clear that the coin has suffered corrosion. It probably has been stored in an aggressive (chemical) environmont. It ould also have been buried for a long time. A corrosive environment causes changes of coulor because of the removal of one of the constituent components from the surface. The composition of these 3d coins is (1937-1970) Nickel-brass (79% Cu, 20% Zn, and 1% Ni). The component dissolved usually is zink (Zn). This will change the colour of the coin to red. Of course other reactions with the metal different coulours could result.
Pillar of the Community
United Kingdom
8109 Posts
 Posted 01/23/2021  05:32 am  Show Profile   Check NumisRob's eBay Listings Bookmark this reply Add NumisRob to your friends list Get a Link to this Reply

Quote:
From the pitted surface it is clear that the coin has suffered corrosion

Looks like a buried coin. I've found dozens of these with my metal detector and they always turn up in this condition.
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