Copper Colour Showing On Rim Of Quarter?

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Author	Replies: 4 / Views: 2,535
NG43 New Member Canada 35 Posts	Posted 10/24/2014 8:28 pm Any thoughts on what this could be? Front 1 Front 2 Reverse 1 Reverse 2 Report this Post to the Staff

DBM Pillar of the Community Canada 9865 Posts	Posted 10/24/2014 8:40 pm Plating problem. The steel blanks are plated with nickel, then copper, then nickel again. "Dipping" is not considered cleaning... -from PCGS website Report this Post to the Staff
darryldarryl Pillar of the Community Canada 2426 Posts	Posted 10/24/2014 9:33 pm I agree 100% Report this Post to the Staff
DaytR Pillar of the Community United Kingdom 837 Posts	Posted 10/24/2014 10:27 pm with the sentiments above, the trouble with multi-plating technology used by the RCM is that the outer nickel plating is small (around 10 microns) compared to full plated coins (e.g UK nickel plated steel coins with one 25 micron thick plating) hence in time a lot of Canadian coins will start to exhibit similar patterns to the coin pictured...... A research firm ,Fraunhofer ,found that nickel & nickel plated steel coins wear out at a rate of around 1 micron a year in circulation so the multi-ply plated Canadian coins should theoretically retain their outer nickel plating for around a decade after which the wearing should start to reveal the copper underneath .....in a similar fashion to the pictures above . Edited by DaytR 10/24/2014 10:28 pm Report this Post to the Staff
NG43 New Member Canada 35 Posts	Posted 10/25/2014 8:39 pm Thank you for giving your thoughts on this coin. Report this Post to the Staff
	Replies: 4 / Views: 2,535

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