backacheUK
New member
As a Brit, What is or are what you US guys call Clad??? I know the're coins but what does Clad mean or stand for?
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Silly question But
- Thread starter backacheUK
- Start date
Simply put, a clad coin is one that has multiple layers of metal in it.
In 1965 dimes and quarters that were previously 90% silver, were switched to clad because the intrinsic value of silver was higher than the face value of the coin. In 1969 half dollars (which were 40% silver from 65-6
were also changed to clad.
US clad coins have an inner layer of copper with outer layers of a nickel-copper alloy.
In 1965 dimes and quarters that were previously 90% silver, were switched to clad because the intrinsic value of silver was higher than the face value of the coin. In 1969 half dollars (which were 40% silver from 65-6
were also changed to clad.US clad coins have an inner layer of copper with outer layers of a nickel-copper alloy.
backacheUK
New member
aaaaah I see, Thanks for that, its similar here in the UK with the 1p & 2p coin They used to be copper but now are steel/copper plated. which means they dont last long in the ground & if your disc is set to kill iron you miss em, no real shame as they are usually in very bad state = corroded...
jimmyk,
The zinc pennies will deteriorate even worse in the Saline River here in south Arkansas. My relic hunting buddy (d2) and I have Detector Pro water machines to hunt the old CW crossings ( most of which have been used as swimming holes for the locals for years and years). A lot of the zinc based pennies will be badly eaten up. Many of them actually look like they've been clipped with scissors, etc. Many of them will be no more than half of their original size. Reading this post made me want to ask...... is it that the zinc deteriorates worse in water? Or, is some other factor coming into play? Is there a high level of mercury in this stream that is eating at the zinc or what? Anyone got a clue???
Hunting these swimming holes provides a lot of fun and welcome relief from the summer heat. Not to mention we still find quite a few CW relics......and bunches of rings, jewelry, etc.
Thanks David at Dixie Metal Detectors for turning us on to these machines!
Kim Allen
The zinc pennies will deteriorate even worse in the Saline River here in south Arkansas. My relic hunting buddy (d2) and I have Detector Pro water machines to hunt the old CW crossings ( most of which have been used as swimming holes for the locals for years and years). A lot of the zinc based pennies will be badly eaten up. Many of them actually look like they've been clipped with scissors, etc. Many of them will be no more than half of their original size. Reading this post made me want to ask...... is it that the zinc deteriorates worse in water? Or, is some other factor coming into play? Is there a high level of mercury in this stream that is eating at the zinc or what? Anyone got a clue???
Hunting these swimming holes provides a lot of fun and welcome relief from the summer heat. Not to mention we still find quite a few CW relics......and bunches of rings, jewelry, etc.
Thanks David at Dixie Metal Detectors for turning us on to these machines!
Kim Allen
Yeh, I didn't know what clad meant until a few years ago when I found a US 1c which had been damaged and in the gound for a good while....the inner core (zinc?) had turned powdery. while the outer layer was in slightly better shape. At the moment our (Aust.) coins are solid alloy, but their value in relation to the copper included is greater than their face value, so we may be in for some kind of change...our $1 coins are presently 92% copper and $2 are 92% cupro nickel, so I'm hoping they're not changed as they give good distinctive signals the way they are.
Willee - Texas
Well-known member
Zinc is used in the marine industry as a sacrificial metal.
Electrolysis quickly carries the zinc away to other metals.
Salt water sets up a strong current eating away at the zinc but any water even just ground moisture will corrode it.
It works quicker if there is another metal object close by.
Electrolysis quickly carries the zinc away to other metals.
Salt water sets up a strong current eating away at the zinc but any water even just ground moisture will corrode it.
It works quicker if there is another metal object close by.