Wave Soldering: The flux used for wave soldering is usually made up of more solvents than flux used for other applications, and will be sprayed on the board prior to it going through the solder wave.Depending on the automated soldering process being used by your contract manufacturer, the flux will be applied in these methods: Within these categories are different types and chemical compositions of the fluxes depending on the needs of the components and boards to be soldered. These categories are Rosin and Rosin Substitutes, Water Soluble, and No-Clean. There are three different categories of fluxes used for soldering electronics according to IPC J-STD-004B. The Application of Different Types of Flux For the automated soldering processes used by CMs during printed circuit board manufacturing, there are a couple of different ways that the flux will be applied. For hand soldering, flux can be applied by a flux pen or is usually in the core of the solder wire that most technicians use. Flux may be solid, pasty, or liquid in form depending on how and where it will be used. It also contains other solvents and additives to help with the soldering process as well as inhibiting corrosion.
#Flux for soldering Activator#
The flux also protects the metal surfaces from re-oxidation during soldering and helps the soldering process by altering the surface tension of the molten solder.įlux is made up of a base material and an activator which is the chemical that promotes better wetting of the solder by removing oxides from the metal.
Oxides are formed when metal is exposed to air and may prevent the formation of good solder joints. The main purpose of the flux is to prepare the metal surfaces for soldering by cleaning and removing any oxides and impurities.
#Flux for soldering manual#
Flux is used in both manual hand soldering as well as the different automated processes used by PCB contract manufacturers.
#Flux for soldering how to#
Defining and Explaining How to Use Flux When Soldering Electronicsįlux is a chemical cleaning agent used before and during the soldering process of electronic components onto circuit boards. Here’s a closer look at all of this and how to use flux when soldering electronics. The key to getting a good solder joint is in using a chemical cleaning agent known as flux before and during the soldering process. And if paying a traffic ticket for not having current license plates on your car is expensive, just wait until you start getting the bills for the component failures on your circuit boards due to bad solder joints. If the metal surface of the board isn’t clean and prepared for the solder, you won’t get a good metallurgical bond between the surfaces.
This same principle applies when electronic components are soldered to a circuit board. The key to preventing this from happening is to make sure that the surface of the license plate is clean and dry before applying the labels. This can lead to an impromptu road-side meeting with a police officer who will want you to pay some additional fees. You have to be careful though because if not applied correctly, these labels may detach while you are driving down the road. After getting the car tested and paying the fee, I was given the two small registration date labels for the license plates. A couple of weeks ago I went through the biennial process of renewing the registration on my wife’s car.
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