Soldering ILM Flashcards
(25 cards)
What are soft solders?
They are alloys made of mostly tin and lead
The percentages in which the tin and lead are mixed vary to ensure what?
That a solder with a lower melting point that the base metal can always be found
What was the solder called when using 50% Tin and 50% lead?
Half and half
What’s the function of soldering flux
To remove the oxide film from the metals surfaces
Muriatic acid is what?
The commercial form of hydrochloric acid
Zinc chloride is known in the trade as what?
Cut, killed, or boiled acid
Stainless steel flux commonly used is what?
Lloyds flux
What is a natural product found in the tar of pine trees?
Rosin
Sal-ammoniac contains what? How can it be obtained?
Ammonium chloride and can be obtained in blocks or powder form
The process of ______ soldering is much like sweat soldering, but with an increased rate of travel
Skim soldering
What do you do when soldering overhead?
You Tin only one side of the copper
The fumes from soldering are?
Toxic
What’s the most common heat source for soldering ?
A soldering furnace
How is soldering coppers sized?
Weight per pair of coppers
What copper is used for long heavy seams?
Hatchet copper
How do you achieve the best results when soldering?
Proper forging, filling, and tinning of the head of copper
What must be done to new soldering coppers before use?
They must be tinned
When must A copper must be re-tinned
If it’s been overheated
On a lap seam, you must ensure what?
All the oxides have been removed with the proper flux
Where should you start when tacking?
The center of the seam and work outward
What makes it hard to solder ?
The rapid formation of and aluminum oxide layer
The dipping solution is made by what?
Dissolving powdered Sal-ammoniac in water
Explain the difference between hard soldering and soft soldering
Hard requires a higher temp
What file do you use for filing copper heads
A single cut bastard or vixen files
