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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