【 JJY 】 Will solder paste being stored for too long affect the soldering quality?

Solder pasteIt is used forSMTA kind of soldering material in surface mount manufacturing, it plays a significant role in the soldering process, which can improve the soldering quality and increase the reliability of the product. However, if the solder paste is stored for too long, it will deteriorate, causing a series of adverse effects.

First of all, the flux in the solder paste may decompose and become ineffective. Flux is an important component for improving the quality of welding. If the flux fails, it will lead to a decline in the quality of the solder joints, and problems such as blackening of the solder joints and failure to form the weld may occur. Meanwhile, the ineffective flux will also release harmful gases, which have an impact on human health.

Secondly, the viscosity and fluidity of solder paste will also change. As solder paste contains a certain proportion of oil components, its viscosity and fluidity will change over time. If solder paste is stored for too long, its viscosity will increase and its fluidity will decrease, which will lead to problems such as bubbles and excessive and large solder joints during soldering, thereby affecting product quality.

In addition, solder paste is also prone to moisture. The components in solder paste are highly sensitive to moisture. Once it gets damp, it will affect the soldering performance of the solder paste, leading to poor soldering problems. Therefore, when using solder paste, it is essential to pay attention to moisture prevention to avoid quality issues caused by moisture.

Meanwhile, solder paste also has the problem of being prone to oxidation. The tin and flux in solder paste are prone to oxidation reactions due to the influence of oxygen in the air, which in turn affects the soldering performance and quality of the solder paste. Therefore, solder paste should be stored in a dry and anti-oxidation environment to avoid the decline in soldering quality caused by oxidation of the solder paste.

In conclusion, if solder paste is stored for too long, it will have many adverse effects on the quality of soldering. Therefore, when using solder paste, attention should be paid to the storage conditions and expired solder paste should be avoided as much as possible. If the solder paste has expired, it must be strictly tested and must not be used on a large scale. Only by ensuring the quality of solder paste can the reliability of the products and the inspection pass rate be improved.

Solder paste storage tips: When new solder paste is unopened, please store it2～10℃Store in the refrigerator. The storage period is6After opening for a month, the remaining solder paste must be sealed and stored in the refrigerator. The excess solder paste scraped back from the wire mesh and the drain plate should not be mixed with unused new solder paste. It should be stored in a separate container to avoid affecting the use of the new solder paste. If you want to learn more about soldering, please keep following JJY Solder Paste Factory and leave a message online to interact with us.