--- In Homebrew_PCBs@yahoogroups.com, "mumin55555" <MUMIN55555@H...>
wrote:
stuff (shipped in powder form) dissolves in warm to hot water and
works best when hot (140F). You immerse the freshly etched/washed
board into the tinnit mixture and within a few seconds, all the
copper turns a silver color. You are supposed to leave the board in
for 10-30 minutes. After plating, it is suggested to thouroughly
clean the board with a mild solution of household ammonia to remove
all traces of the plating solution. The name of the material would
suggest tin plating, but there is no electro-plating process. I'm
not entirely sure what it is, but I have yet to have one of my boards
(treated with this stuff) corrode.
You can also use a lacquer spray to paint/protect the board after
assembly to prevent corrosion. I used to use a clear coat of MG
Chemicals Conformal Coating, but I believe it is simply clear acrylic
Lacquer.
Good luck
wrote:
> i am making a lot of pcbs but after a while they oxidize(corosion).
> i couldnt find any flux on electronics stores (here in israel iI have achieved good results with Tinnit (DATAK) tin "plate". The
> could hardly find copper boards). is there someplace alse where i
> can get something to prevent corosion????
stuff (shipped in powder form) dissolves in warm to hot water and
works best when hot (140F). You immerse the freshly etched/washed
board into the tinnit mixture and within a few seconds, all the
copper turns a silver color. You are supposed to leave the board in
for 10-30 minutes. After plating, it is suggested to thouroughly
clean the board with a mild solution of household ammonia to remove
all traces of the plating solution. The name of the material would
suggest tin plating, but there is no electro-plating process. I'm
not entirely sure what it is, but I have yet to have one of my boards
(treated with this stuff) corrode.
You can also use a lacquer spray to paint/protect the board after
assembly to prevent corrosion. I used to use a clear coat of MG
Chemicals Conformal Coating, but I believe it is simply clear acrylic
Lacquer.
Good luck