12
Ferrous Metals, Nickel Alloys, and
Stainless Steels: To
remove flux residues from ferrous metals, nickel and nickel alloys, a solution
of 10-15% hydrochloric acid mixed
with water, applied with a non-metallic
brush, is effective. Aluminum
and Aluminum Alloys To
remove flux residues from aluminum and aluminum alloys, immersion for one or two
minutes in a 10-20% solution
of caustic soda at between 122°-176°F (50°-80°C) is effective.
This treatment should be immediately followed
by a hot water (120°F, 49°C) rinse and application of a 20-30% solution
of nitric acid mixed with water to neutralize
the caustic soda residue. Finally, the work should be thoroughly rinsed again
and immediately dried. Filler
Metals Most Commonly Employed •
Silver Brazing Alloys (usually given the misnomer “silver solders”)
• Copper-Silver-Phosphorus
Brazing Alloys •
Copper-Phosphorus Brazing Alloys •
Aluminum Brazing Alloys •
Soft Solders
