"Arfa Daily" wrote in message ...
I'm a bit confused about the talk of not using acid fluxed solders in electronics. Just about all conventional solder wires formulated for electronic work, contain one or more cores of rosin based flux. As far as I am aware, this is a fundamentally acidic material when in its activated state, and in fact its being acidic is how it removes the tarnish and oxidation on the surfaces to be joined.

Afra -

In the United States, acid core (and not rosin core) was readily available for the plumbing trades (soldering copper water pipes)
When I started in 1970, it was easier for a newcomer to walk into a hardware store and purchase this formulation instead of rosin core (referred to as Radio-TV solder it that era).

While the problem has been greatly reduced, I still find a few amateurs commenting that they are using the same roll of solder they purchase many years ago -- for the copper water pipes in the house.

gb