Ok – I have never used the AP process for eliminating copper (&/or brass) base metals because I get my nitric cheap enough so I use nitric instead.
However – I have an unusual case here (at least unusual for me) I am working on recovering the Pd contact point wire from a Hammond organ
There are several long bus bars that have a Pd wire running the full length of them – that’s the wire you see on the left of the picture – this was easy to remove by putting the bus bars in hot HCL to brake the solder bond
However – on the end (tip) of the “key” contact bus bars – there is also a “very small” Pd wire that is the contact point that makes the contact with the long bus bar when you press a key when playing the organ (the pile of copper points on the left which is about a quarter of the points to be processed)
Now I could just dissolve both copper & Pd in nitric & then precip the Pd from solution – but because the wire is already pure Pd – I would rather just rid the copper – recover the wire & go right to melt along with the wire already recovered from the long bus bars.
So AP seems the process of choice in this situation – however – everything I have read about AP calls for the use of a bubbler & it does not make any sense to go buy a bubbler for this very small batch (4 time what is in the pic) & most likely a one time process for me.
So will AP work with out the bubbler & if so how much peroxide to how much HCL do I use?
Kurt
However – I have an unusual case here (at least unusual for me) I am working on recovering the Pd contact point wire from a Hammond organ
There are several long bus bars that have a Pd wire running the full length of them – that’s the wire you see on the left of the picture – this was easy to remove by putting the bus bars in hot HCL to brake the solder bond
However – on the end (tip) of the “key” contact bus bars – there is also a “very small” Pd wire that is the contact point that makes the contact with the long bus bar when you press a key when playing the organ (the pile of copper points on the left which is about a quarter of the points to be processed)
Now I could just dissolve both copper & Pd in nitric & then precip the Pd from solution – but because the wire is already pure Pd – I would rather just rid the copper – recover the wire & go right to melt along with the wire already recovered from the long bus bars.
So AP seems the process of choice in this situation – however – everything I have read about AP calls for the use of a bubbler & it does not make any sense to go buy a bubbler for this very small batch (4 time what is in the pic) & most likely a one time process for me.
So will AP work with out the bubbler & if so how much peroxide to how much HCL do I use?
Kurt
