Solder wire diameter are one of the first factors to consider in the soldering process. The diameter of the solder wire will determine how much solder that can reach the specific joints that is to be soldered. If the solder wire are too thick for the joint, the solder may bridge the gap between the pads that is to remain separate.
If the solder wire is too thin for the joint, the solder wire may not provide enough solder to complete the soldering process. Therefore, you must select the diameter of the solder wire according to the size of the joint that is to be soldered. Fine diameter solder wire is used for tiny joint, such as those from surface mount components.
How to Choose the Right Solder Wire
Thick diameter solder wire is used for joining large components, such as through-hole leads or wire that are to be spliced together. The next factor to consider when selecting solder is the type of flux that will be used. The flux will aid in the process of the solder wire join the two components.
There are three types of flux that are used in soldering electronics: rosin based flux, no-clean flux, and water-soluble flux. Rosin-based flux is the most common flux for electronics applications because rosin-based flux is reliable and the byproduct of the fluxing process is relatively harmless to the electronic component. No-clean flux is often used because it dont require the soldered component to be wash after the soldering process is completed.
Water-soluble flux is used for components that are heavily oxidized prior to soldering. However, after soldering with this flux, you must thoroughly clean the component with a water-based solution, as the flux residue will react with the circuit board if it is not removed. The third factor to consider when selecting solder is the type of alloy that will be used.
The type of alloy will determine the melting temperature of the solder. Leaded solder melts at a lower temperature than lead-free solder. Because of the relatively low melting point of leaded solder, it often flow more easily, which makes it more popular used for hobby electronics projects.
However, regulation regarding lead content in consumer products requires lead-free solder for consumer electronics. The melting point of both types of solder will need to be considered when selecting the correct solder for each component to be soldered. Additionally, you must consider the temperature range for each solder alloy when setting the soldering iron to the proper temperature.
There are a few types of specialty solders that are used for tasks that are not related to the electronics industry. Silver bearing solder is used for tasks like jewelry making or plumbing work because silver-bearing solder contains silver that increase its strength. Additionally, electronics industries use low-temperature bismuth alloys for reworking heat-sensitive components because these alloys melt at a relatively low temperature that will not damage the heat-sensitive component.
Temperature management for the soldering iron is a factor in the soldering process. If the temperature of the soldering iron is too low, the solder wire will not melt complete. Additionally, if it is too low, the melted solder will form a dull joint between the two components.
If the temperature of the soldering iron is too high, the flux will burn off before the soldering process and the soldering iron may damage the circuit board by lifting the solder pads from the board. Soldering technique is a critical part of the soldering process. You should heat solder joints, not the solder wire.
Additionally, the solder wire should be feed to the heated joint, not to the tip of the soldering iron. Moreover, the soldered joint should have a concave fillet that is smoothly indicating a successful soldering process. Finally, ventilation in the workspace is necessary to avoid breathing in the smoke create by the flux in the solder wire.
To ensure that solder wire remains functional, it should be stored in a way that avoid exposure to humidity. Humidity can degrade the flux that is contained within the solder wire. If the flux within the solder wire degrades, the solder will not function correct when attempting to solder electronic components.
Additionally, if solder is leaded, it is necessary to wash your hands after handling the leaded solder. Lead can be harmful to the human body, so washing your hands will prevent the transfer of lead to you’re face or food. In the soldering process, there are three main decision to make regarding the solder to be used.
First, you must select the diameter of the solder wire according to the size of the joint. Second, you must choose the type of flux according to the cleaning method that are to be used on the electronic components after soldering. Third, you must select the type of alloy according to the melting point requirements for the components to be soldered.
Each of these three factor will allow for the creation of better solder joints and for the soldering process to be performed in a more efficiently manner.
