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Date: | Tue, 10 Feb 1998 08:05:28 -0800 |
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Tony Bugeja wrote:
>
> -- [ From: Tony Bugeja * EMC.Ver #2.5.02 ] --
>
> Does anyone have information on soldering silver terminals. We currently use
> RMA 615-25 flux an we are getting tarnishing/oxidation when hand or wave
> soldered. I looks like the silver is being vaporized off and the brass
> below is showing through, the plating thickness is .0003". Is this a
> process problem or is it a vendor problem?
> --
> Tony Bugeja, P.Eng. E-Mail: [log in to unmask]
> Process Engineer Phone: (204) 631-7241
> C-Mac Electronics Fax: (204) 631-7294
> 1455 Mountain Ave
> Wpg., Mb. R2X 2Y9
>
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For plated solder coatings on brass it is necessary to provide an
underplate such as copper to prevent zinc from "poisoning" the solder
and destroying solderability - the same is probably true for silver.
Phil Dudley
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Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
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