Can lead-free solder paste still be used after its expiration date? What should I do if the solder paste has expired? -- JJY Solder Paste Manufacturer

Lead-free solder pasteCan it still be used after expiration? What should I do if the solder paste has expired? Many people would ask such a question: The shelf life of solder paste is generally6Can solder paste still be used after its expiration date in a month? What impact will it have on the product if used? How long after the expiration date can solder paste be used at most? And in the case of most companies, how to put it? It depends on the company's requirements. Some companies strictly follow strict control methods, and those that have expired will be scrapped and disposed of. If the company is not very strict, you can do some experiments yourself. It's ordinaryCHIPSOPIt's not a big problem, rightBGAIt's better not to use such things. Of course, it is also necessary to feed back to the superior leaders and it is best to seek instructions. Now, let JJY Solder Paste Manufacturer explain it to you:

First of all, we need to get to know the ingredients of lead-free solder paste. Only in this way can we better understand why lead-free solder paste expires. Solder paste is mainly composed of solder powder and flux paste mixed together, and this2The quality and reliability of the raw materials determine the service life of the solder paste. The general lead-free solder paste is classified according to the quality of the flux3The shelf life varies from one month to one year. Beyond this period, lead-free solder paste will expire.

Immediately after that, we can come to understand the changes that occur after lead-free solder paste expires. As the quality and reliability of the flux gradually deteriorate, lead-free solder paste may dry out, lose some of its viscosity and get oxidized.

So, can lead-free solder paste still be used after its expiration date?

If the lead-free solder paste is only dry, it can still be used. When the lead-free solder paste is dry, it can be mixed and stirred with new lead-free solder paste in the corresponding proportion for use. An appropriate amount of flux can also be added because the flux contains surfactants, which can enable the lead-free solder paste to fully exert its soldering effect.

If the lead-free solder paste has been severely oxidized, it is recommended not to use it anymore. The oxidized lead-free solder paste, due to the loss of the effect of the flux and part of the solution, may produce "solder beads" during the soldering process. The appearance of "solder beads" not only affects the appearance of the product board, but more seriously, it is due to the concentration of electronic components on the printed circuit board. During the product's usage, there is a very high possibility that it will cause short-circuit faults and other situations, which in turn will lead to a significant decline in the product's quality.

Therefore, using expired lead-free solder paste is extremely harmful. Try not to use expired lead-free solder paste just to save some money, as it will seriously affect the quality of electronic devices and cause greater losses to enterprises. Do not end up losing more than you gain.

During the storage period of lead-free solder paste, we should use and store it reasonably, keep in mind the effective usage date of lead-free solder paste, adhere to the principle of "first in, first out", and prevent lead-free solder paste from deteriorating prematurely.

If there are expired lead-free solder pastes, we can contact companies that recycle and reuse used lead-free solder pastes for recycling and processing. This can effectively prevent losses, save costs for the company, and also contribute to environmental protection, achieving multiple benefits at once.

Therefore, using expired solder paste is highly harmful. One should not use expired solder paste just to save some money on it. This will cause even greater damage to electronic products and result in more severe losses for enterprises. Therefore, we should use the solder paste reasonably within its shelf life, keep in mind the effective usage date of the solder paste, and adhere to the principle of "first in, first out". In addition, even within the shelf life, we should store it carefully and recycle expired solder paste to prevent it from deteriorating and expiration prematurely.

Want to know about solder pasteLead-free solder pasteFor any soldering issues such as solder paste, we welcome partners to consult Shenzhen JJY Industrial Technology Co., LTD. Let's learn and grow together! The solder wire, solder paste and solder rods of JJY brand are always waiting for partners to come and take them together.