Found a new sheet of nickel silver that had been buried, and decided
to do a mockup piece today. It is 4 x 1 in size. Tossed it in the
pickle after soldering and half of the piece turned a weird mottled
brown with a little copper plating. However. the other half of the
piece was not discolored at all. My first thought was that it came
in contact w/ steel. so I then tossed a scrap piece of sterling in
the pickle. No plating/coating/discoloration.
I did not use steeltongs. This not only happened once. but twice.
When it happened the first time I figured I just messed up and used
the wrong tongs... so I cleaned it up using sparex/peroxide. and
tried it again. Same scenario. Half the piece...
I purchased this nickel from a reputable source..
Ideas anyone? Thanks--