Can leaded solder paste and lead-free solder paste be used together

In the electronics manufacturing industry,Solder pasteIt is a key material used to connect electronic components with circuit boards.Lead-free solder pasteand There is lead solder pasteThere are two main types of solder paste. However, the question of whether they can be used in combination has long troubled many manufacturers and users. inSMTIt's a waste to throw away the unused solder paste in the surface mount technology. If another type of solder paste is used for the next surface mount, can these two types of solder pastes be mixed together for use? Now, Shenzhen JJY Solder Paste Manufacturer will explain it to you:

First of all, let's take a look at the basic differences between lead-free solder paste and leaded solder paste. Lead-free solder paste does not contain lead but other metals such as silver and copper. This solder paste meets environmental protection standards and is harmless to the environment and human body. On the contrary, lead-containing solder paste contains lead and has good fluidity and wettability, making the soldering process more stable.

Then, can lead-free solder paste and leaded solder paste be used interchangeably?

The answer is no. This is because the components and properties of lead-free solder paste and leaded solder paste are different. Mixing them may lead to the following problems:

1Different melting points: The melting points of lead-free solder paste and leaded solder paste are different. Mixing them may cause problems during the soldering process, such as false soldering and missed soldering.

2Different viscosities: The viscosities of lead-free solder paste and leaded solder paste are different. Mixing them may affect the printing and coating effects of the solder paste, thereby influencing the soldering quality.

3Different mechanical properties: The mechanical properties of lead-free solder paste and leaded solder paste are different, such as hardness, tensile strength, etc. Mixed use may lead to a decline in the performance of the solder joints, such as strength and impact resistance.

4Different corrosiveness: The corrosiveness of lead-free solder paste and leaded solder paste is different. Mixed use may cause corrosion problems during the welding process, affecting the reliability and lifespan of the weld points.

Therefore, to ensure the quality of soldering and product performance, everyone should avoid mixing lead-free solder paste with leaded solder paste. Instead, the appropriate type of solder paste should be selected based on specific process requirements and product characteristics. At the same time, when consumers purchase and use solder paste, they should also pay attention to choosing products that meet their own needs to ensure the smooth progress of the electronic manufacturing process.

In conclusion, lead-free solder paste and leaded solder paste should not be mixed. Only by following the correct usage method can the welding quality and product performance be ensured.

Shenzhen JJY Industrial Technology Co., Ltd. mainly engages in:QFNHigh solder climbing rate solder paste, zero halogen solder pasteVOIDLow-porosity solder paste, laser solder paste, water-washed solder paste, and high-reliability ones used in military, aerospace, power, photovoltaic and other industriesSn62Pb36Ag2Solder pasteSn62.8Pb36.8Ag0.4Solder paste6337Solder paste, transparent and colorlessLEDHigh-brightness anti-monument solder pastemini-LED/micro-LEDDie bonding solder paste, high-reliability lead-free low-temperature solder paste, low-temperature solder paste for heat sinks, professional solder paste for hardware soldering, lead-free medium-temperature solder paste, lead-free high-temperature solder paste0307/105/305Manufacturers of solder paste and other soldering materials.