It cleans the surface to be soldered
It lowers the melting point of the solder
It makes the flow of solder in the joint easy
It does all the above
Zinc chloride
Hydrochloric acid
Sal ammonia rosin
Rosin
solder
soldering bit
bonding agent
soldering flux
200 Degree C
400 Degree C
600 Degree C
800 Degree C
Soldering with the soldering gun
Soldering with torch
Temperature controlled soldering iron
Dip soldering