What kinds of welding electrodes are used in the copper tubes for air conditioning? What's the difference?
There are silver electrode and two electrode containing phosphonium, the former used in high sulfur environment, the price is about 3 times higher than the latter.
Two: copper electrode and silver electrode
There are two kinds, one containing silver, one containing phosphorus. The former is used in a high sulfur environment, and the price is about three times higher than that of the latter
