How to use a soldering iron flux?

Posted by Alphaassembly on July 29th, 2016

How to use a soldering iron flux? What is the process that goes into soldering two surfaces? These questions seem to be little tricky and technical but they become easy to understand when you consider the end use of the process and how it is effected. Soldering iron flux plays an important role in the process of soldering, imperative for achieving an accurate and effective connection between two elements in an electronic circuit. Before moving on to see how to use it, it is first necessary to know what soldering is.      

What is Soldering?

Talking in layman language, it is a strong link induced between two portions of metal which are to be combined together. An alloy blend of tin and lead (other metals are also used sometimes) is used to achieve this bond by running it over two pre-heated parts of metal while holding them together. In soldering, one is basically “gluing” two parts together with a molten metal.

What is Soldering Flux?

During the soldering process, it is important to ensure that all the surfaces involved in the joint/connection are clean and free from oxidation. Soldering flux is a paste that is used to keep the surfaces free of impurities while soldering. As such, it is a very important part of the entire process because for achieving a good bond, flux prevents oxidation and ensures that the joint/connection remains free of impurities. Technically there are four major components where flux is to be applied – the PCB or circuit board, the soldering core, the component and the soldering iron.

How is soldering iron flux used?

•    To apply flux on the PCB components, dip their legs in the paste and take them out instantly. This ensures application of a thin layer of flux on them. Excessive flux should be avoided. Using a medium that does not leave behind residue, apply the flux on the board.
•    You can use the dip process to apply flux on the core. On the other hand, to apply flux on the soldering iron, fix the core in the iron to transfer it.
•    Remember to avoid excessive application of flux to the surfaces, as it may prevent a bond from forming when heated. It will just keep bubbling because of the heat. If, in case, excessive amount gets dropped on any of the surfaces, use a non-residue medium to scoop it off.

Advantages of flux?

A good soldering flux ensures that your metals are bonded properly. Since all these materials are costly, it also helps in ensuring that your soldering job is economical and efficient. Flux keeps the components clean, guaranteeing a properly sealed and corrosion-free bond. It prolongs the life of your device.

All the professionals in the field of electronics know the importance of effective soldering, and echo in the fact that flux is the most important part of the process. Choosing the right flux and applying it optimally ensures a high-quality finished product.

About The Author:

Alpha Assembly Solutions is a premier company engaged in the development and manufacture of high quality electronics assembly materials. Since the year of its inception, way back in 1872, the company has played its role on the frontline of innovation, bringing many first-to-market products to the fore thereby, creating a premier niche for itself in the market.