? ? ? ? ? ? ? ? ? ?It is a paste containing 27% Zinc Chloride, I hope when heated with soldering iron on a point to point circuit connection the remnants would not be corrosive,? mostly I use it to be able to wet ( with solder) crusty tube point to point wiring for equipment that has been exposed to high humidity in storage, Brad
On Sat, Oct 19, 2024, 10:24 Chuck Harris via <cfharris=[email protected]> wrote:
And why do you think hydrogen isn't a flux?
-Chuck Harris
On Fri, 18 Oct 2024 13:01:21 -0700 "Ed Marciniak" <edr10000@...>
wrote:
> It *IS* possible to solder without flux, using hydrogen in a carrier
> gas, but it requires a high enough temperature for the hydrogen to
> reduce surface oxides, and a relatively clean (thin oxide) surface.
>
> There is lower flammability limit to consider, as well as whether the
> hydrogen might be a problem. I wouldn¡¯t choose to use forming gas to
> seal a crystal can, for example.
>
> One might use sputtered gold surfaces devoid of oxides, freshly
> plasma cleaned, a gold tin solder preform and a GaAs laser diode chip
> vapor phase cleaned, and want a reducing rather than inert carrier
> gas, when cleaning flux residue becomes infeasible.
