Put the rod in the hole and tap down from the bottom for a snug fit.
Solder not sticking to aluminum sheet.
Flip it back over flux solder and polish again.
It s all about materials and temperature.
Just because a flux is strong enough to solder an alloy like stainless steel doesn t mean it ll work on aluminum.
Certain metals are harder to solder to because they are harder to heat up.
Too cold and it will not stick right.
In order for a solder joint to hold properly both materials need to be heated above the melting point of the solder.
Too hot and you can discolor melt or destroy.
Step 1 sand the area to be joined with fine sandpaper steel wool or emery paper to remove any surface oxidation or corrosion.
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With very little practice you can get a very nice fluid curved transition from the rod to the base.
Wipe away the dust with a damp cloth.
Sometimes it is necessary to heat the tip of the solder rod with the flame to help the solder flow more easily onto the.