Also depends amongst other things what you want to do next and the plated metal underneath. Possibly you could dissolve the white gold in some low melting point alloy and then wicking/sucking that off. Might need a couple of iterations. Use as small amount of low activity flux as helps the initial wetting of the alloy to the plate but hopefully not the underlying base metal. If that were nickel that might come clean, but copper would likely wet. I think IBM [Switzerland] did some work on this using fusible alloys and published. It was many (30?) years ago so locating their pre-internet paper based on this sparse recollection might be problematic. Alternatively if you are to solder the surface just do traditional double flush with the alloy you are going to solder with. Alternatively alternatively abrade it off. -- Regards Mike -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman Sent: Friday, March 25, 2016 1:16 PM To: [log in to unmask] Subject: Re: [TN] Calling All Metallurgists Hi Bob - there are not a lot of elegant ways to remove surface finishes from component leads. There are some chemical stripping processes but most folks just have the component re-tinned by solder dipping. Do you know the reason they want to remove the surface finish? Dave Hillman Rockwell Collins On Fri, Mar 25, 2016 at 7:48 AM, Bob Wettermann <[log in to unmask]> wrote: > All: > > Thanks for the auger discussions. > > Here's another weird one for all of you hardcore metallurgists. > > Client has white gold parts covered with 30 micro inches of gold plating. > > White gold is Au-60%, Pt 11%, Cu 14%, Ag 7%, Zn 1.5% and Pd 6.5%. > > They would like to remove the flash gold ....ideas? > > Thanks > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > -- > Bob Wettermann > BEST Inc > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________