Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Ancient Coins
>
Proof of principle: removing iron oxides from silver coins
>
Reply to Thread
Message:
<p>[QUOTE="-jeffB, post: 7464031, member: 27832"]I'm not sure what ancient coin conservators are willing to put up with, but speaking from a chemical perspective, it seems like a bad idea.</p><p><br /></p><p>Hydrochloric acid would rapidly leach out tin and other more active metals. It would also take off the oxide layer that gives copper-based alloys their "natural" patina. So, you'd be left with a porous surface that's got more copper -- as [USER=10613]@Victor_Clark[/USER] said while I was typing <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />, "pinkish".[/QUOTE]</p><p><br /></p>
[QUOTE="-jeffB, post: 7464031, member: 27832"]I'm not sure what ancient coin conservators are willing to put up with, but speaking from a chemical perspective, it seems like a bad idea. Hydrochloric acid would rapidly leach out tin and other more active metals. It would also take off the oxide layer that gives copper-based alloys their "natural" patina. So, you'd be left with a porous surface that's got more copper -- as [USER=10613]@Victor_Clark[/USER] said while I was typing :), "pinkish".[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Ancient Coins
>
Proof of principle: removing iron oxides from silver coins
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...