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Date: | Thu, 18 Sep 1997 07:18:18 -0500 |
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Hi Stein -
There are a number of water soluble, acid fluxes that you could use for
your tinning operation for several manufacturers. I have seen the Superior
30 work well in several applications. I am surprised that the ESA
specification (this is one spec I have never seen) allows the use of a acid
flux in place of a RMA, especially for space applications. Whatever acid
flux you do choose I would suggest you run some cleanliness tests to assure
yourself that your tinning process does not leave a residue on the
components that could lead to corrosion. Good Luck.
Dave Hillman
Rockwell Collins
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Subject: [TECHNET] Pretinning - Flux
Technetters,
I have some problems pretinning some components stored for 5 years.
The components shall be used in space equipment and according to
ESA-PSS-01-708 we can use rosin based flux (RMA) for pretinning. If
RMA flux are inadequate, corrosive water-soluble acid flux can be
used.
For our components RMA flux does not do the trick.
1) Does anyone know a good method that can be used?
2) Does anyone know suppliers of corrosive water-soluble acid fluxes?
3) We have heard of a flux type called SUPERIOR 30. Can anyone tell me
about suppliers of this flux?
Thanks,
Stein Davidsen
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