Gold dissolves into the solder. Then, when you remove the solder you also
remove the gold. 
A simple analogy is like sugar in water. Imagine a cup with sugar stuck to
the inside. Fill it with hot water. Sugar dissolves, pour out hot water,
sugar goes with it. 



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert DeQuattro
Sent: Thursday, May 09, 2013 8:28 AM
To: [log in to unmask]
Subject: [TN] Gold Removal

Hello Fellow Technetter's,

I have a question on J-Std-001E 4.5.1 Gold removal which states a double
tinning process  or dynamic solder wave may be used.  Can any of you
describe this process.  How is the gold actually removed?  Or is it just
being tinned?  Gold melts at over 1000 C so I am a little confused.

Thanks,

Bob

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