Rosin core solder mainly consists of a solder wire as a tube in the centre, which contains the flux. The flux is mild in nature and hence can be used to solder parts where the flux cannot be removed. Electric circuit boards or electrical connections are the few applications of this device. This type of soldering is used when there would be no need of removing the flux after soldering.
The main reason for the technique to gain popularity is that the residue left behind is non-corrosive in nature. Hence, if it is not cleaned, then the material of Brazing Rods would not cause any damage to the board or its surroundings. This help in increasing the life of the board and the need to clean the area after soldering.
Many manufacturing units extensively use this technique in many manufacturing industries. The aggressive nature helps in easily soldering steel and other forms of metal. If acid version is used, then the residue must be removed after the procedure is completed, so that corrosion of the surface can be avoided. The heat source for the technique can be anything from fuel torch to soldering irons and guns.
If one wishes to add additional flux from outside, then one should be careful in choosing the material. It is important to note that the new substance should be compatible with the substance in the torch.
During the manufacturing process, if the company is using full rosin or water soluble flux for soldering, then it must be because the customers has asked for it or the industry specifies such usage. The other reason for the preference could because of legacy being followed.
One should be aware that both types of flux produce reliable and good result. Many companies avoid selecting soldering because they wish to avoid the pain of cleaning process.
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