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Aluminium Bronze Coin Color

 
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Author Previous TopicReplies: 6 / Views: 279Next Topic  
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Lebanon
355 Posts
 Posted 09/22/2021  10:38 am Show Profile   Bookmark this topic Add chronos to your friends list Get a Link to this Message
Hello
I know that aluminum bronze coin are yellow in color ,but I have seen a one red like bronze color with few tiny spots of yellow, the coin doesn't looked as damaged it contains all the details , could it be soaked in a sort of chemical material that removed the yellow color or it is an error coin?
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Canada
11957 Posts
 Posted 09/22/2021  10:45 am  Show Profile   Bookmark this reply Add JimmyD to your friends list Get a Link to this Reply
No way it could be an error, striking of a coin does not change the colour.
Anything could have happened to it after it left the mint. Environmental toning, chemical reaction etc.
It would be almost impossible to know what caused it. Does it really matter as no matter what it was,
it is still damage.
Edited by JimmyD
09/22/2021 10:47 am
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Canada
18297 Posts
 Posted 09/22/2021  11:27 am  Show Profile   Bookmark this reply Add Dorado to your friends list Get a Link to this Reply
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United States
27 Posts
 Posted 09/22/2021  6:38 pm  Show Profile   Bookmark this reply Add OldSilverDollar to your friends list Get a Link to this Reply
Not sure I want to say Distilled Water for three days with water changed daily in a glass jar and sealed lid away from any heat source then rinse with distilled water and dry quickly with a blow dryer.

Acetone not sure if it's safe with aluminum bronze?
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Australia
19084 Posts
 Posted 09/22/2021  9:48 pm  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
Most probably not an error coin, with the wrong alloy.

I have seen white metal copper nickel coins in high grade tone to a golden yellow tone,
despite the intention that they remain white, to simulate the color of silver coins.

To give a copper coin a yellow color, it is alloyed with around 6% to 10% aluminum, the remainder nickel to harden the alloy.
Nevertheless, given the right environmental conditions, such as burial for a few weeks in acid soil,
aluminum bronze coins can tone to a bronze brown color,
despite the intention that they remain yellow, to simulate the color of gold coins.


The only way to prove the alloy would be XRF testing.
However, unless you have substantial independent supporting evidence to suggest that wrong alloys may have been used in error, the fees for XRF testing would not be justified.



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United States
12012 Posts
 Posted 09/22/2021  11:39 pm  Show Profile   Check spruett001's eBay Listings Bookmark this reply Add spruett001 to your friends list Get a Link to this Reply
Pics would help.
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In Memory of Tootallious 3-31-1964 to 4-15-2020

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United States
20394 Posts
 Posted 09/24/2021  1:22 pm  Show Profile   Bookmark this reply Add just carl to your friends list Get a Link to this Reply
As noted please supply photos of that coin.
just carl
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