Post by Bob M.It's likely that the tip was coated with something that you've now
sanded/filed off, getting you down to bare metal, which may not last as long
or even let itself be "tinned".
Depending on the cost, I'd start with a brand new tip and put the sandpaper
and file far away from it. Then find a piece of fine steel wool and keep
that nearby. When you're done using the soldering iron or gun, unplug or
turn it off and lightly wipe the tip clean. I do this while holding it over
a metal garbage can. Then put it down and let it cool off. Should have a
very thin haze on it when you use it next time, but you can repeat the steel
wool process to shine it back up. That has worked for me for over 30 years.
Bob M.
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Post by captain bobI wrote that out of order
I did sand/file it,
then heat it
then dip it in the flux (which is getting old)
I think you may be right about the flux being weak, I remember the
nokorode worked great when new.
I do have a HAKKO blue soldering iron that has a shiny tip that is
easy to clean, and an old weller gun that is ok when it works.
thanks
On Fri, 24 Oct 2003 17:38:05 GMT, "Fred B. McGalliard"
Post by Fred B. McGalliardYou may have inadvertently negated the effect of the flux by letting the
iron heat up after fluxing. Dip the HOT iron tip in flux and the flux
will
Post by captain bobPost by Fred B. McGalliardremove the oxide that tends to grow there. Immediately, before the oxide
can
Post by captain bobPost by Fred B. McGalliardgrow back, put the solder on it. If the solder still will not wet it, the
flux may be too weak, or the iron tip may be some kind of plating with a
nickel sub plate. The nickel subplate will not wet easily. Get a new tip.
Post by captain bobare there any tricks to soldering iron or gun maintenance?
should I dip the tip into vinegar or something?
after tightening the screws on a cheap 30w iron.
I sanded the tip to get all the black off (is this carbon?)
I dipped it in nokorode (flux)
It got hot reasonably fast, but the solder would not stick to it
before it was covered in black again. I can melt the solder into a
ball sitting on a block of wood, but it will not coat the tip!
should I use something other than wood as a working surface? ceramic
tile?
do I need a new jar of nokorode?
what is the secret ingredient or technique?
thanks
Here's my tips for what it's worth. I keep a small jar (former nail
polish) with a brush containing phosphoric acid (chrome wheel cleaner)
on my bench. I use that to clean copper including preparing a new
soldering tip. I have used it to clean badly oxidized wire, but of
course you need to make sure it's off when done or you can have later
failure.
I make tips for the soldering guns from solid copper grouding wire of
various gauges. I cut a piece, perhaps 6 inches. Then I flatten the
middle part with a hammer and bend it to the proper shape and trim the
ends to length. This costs virtually nothing. For real fine work you
can use tiny gauge and a small gun.
The soldering guns with the bent tips that fit in a hole and have a
nut that tightens down can sometimes lack proper contact in that area,
which causes long heating times and poor performance. I have tried
mounting the tips on the side of the electrodes by using small hose
clamps. This works very well. On other guns I have drilled straight
down the electrode and then cross drilled and tapped screw holes so I
can simply push a new tip in and tighten the screws.