Thankyou very much for the reply to my post on this subject. I thank
Neilthejeweler and Paul Finelt.
I have written Hoover and Strong to see if they can shed any light
on the problem. If and when I receive a reply I will certainly post
As for polarity, all is fine and correct. This is a good suggestion
and would seem an obvious problem but we have been in the business a
while now and the polarity is correct. Certainly, reverse polarity
could and would cause a problem but this time that is not the reason.
As for grain size, etc., affecting the plating and electroclening
process, there might be something to that. The shank was forged,
annealed, formed and soldered to the ring top with palladium
solders. The shank was quite flat on the sides and did show more of
the effect than the cast top. The cast top did show the orange peel
but perhaps to a lesser amount:; considering the detail in the top
section of the ring it was really difficult to determine if it was
less affected or the same as the shank.
Yes, different metals are different! No doubt about that regardless
if from the same "family" of metals. Also, who knows for certain what
other elements are in the PD alloy besides ruthenium. The makers
state trace amounts of other elements are added to improve ductility,
etc. Palladium seemed to fail some many years ago, in the market
place overall and in workability. Perhaps the new alloys will solve
Regardless, if there are problems with rhodium plating the basic
alloy, the manufacturers it would seem should alert the jewelers to
this issue. Why plate in the first place? The customer wants the
color of the ring to match with their white gold rhodium plated items
and it would seem simple enough. Simple? No way.
I truly appreciate the replies and will let you know if I hear from
Hoover and Strong. Thanks again. Thomas.