Soldering technology has been successfully applied in various industries of electronic products for a long time, and it has created more and more accurate high-density technologies. The solder wire is composed of two metals, tin and lead, in a certain proportion. It is an indispensable medium connecting components and circuit boards. It is widely used in the production and maintenance of the electronics industry. Generally, smoke is generated when soldering with solder wire, so many people want to know whether the smoke of solder wire is toxic?
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　　 Is the smoke of solder wire toxic?
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The solder wire is mainly composed of two parts of tin alloy and additives, and the fumes produced by this solder will cause some harm to the human body. If you often engage in the occupation related to solder, it will cause lung damage and respiratory tract damage. The fumes from soldering may cause pneumoconiosis. Generally, occupational hazards have a greater impact on the respiratory tract and lungs. If tin oxides and tin dioxide are inhaled, according to the International Chemical Safety Card: May cause mechanical irritation of the respiratory tract, long-term repeated Exposure may damage the lungs and cause benign pneumoconiosis (tin pneumoconiosis).
Lead is a toxic substance. Excessive absorption by the human body can cause lead poisoning. Ingestion of low doses may affect human intelligence, nervous system and reproductive system. The alloy of tin and lead is commonly used solder. It has good electrical conductivity and low melting point. Therefore, it has been used for a long time in the welding process. Its toxicity mainly comes from lead. Lead fumes produced by soldering can easily lead to lead poisoning.
Lead metal may produce lead compounds, all of which are classified as hazardous substances. Lead in the human body can affect the central nervous system and kidneys. The environmental toxicity of lead to some organisms has been generally confirmed. Blood lead concentration above 10μg / dl will produce sensitive biochemical effects. If long-term exposure causes blood lead concentration to exceed 60 ~ 70μg / dl, it will cause clinical lead poisoning.
Lead is definitely toxic. When soldering, smoke will appear, which contains an element that is harmful to the body. When working, it is best to bring a mask, but it will still affect it somewhat. Of course, if you can use lead-free solder wire, it will be safer than leaded. With the introduction of EU ROHS standards, more and more factories now choose lead-free and environmentally friendly, and leaded solder wire is also slowly being replaced.
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　　 Characteristics of lead-free solder wire
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1. Good wettability, electrical conductivity, thermal conductivity, easy to tin.
2. The percentage content of rosin is customized according to the customer's needs, and the welding does not splash.
3. The flux is evenly distributed, and there is no broken flux in the tin core.
4. The winding is uniform without knotting, the speed of tin coating is fast, and the residue is very little.
5. The tin wire diameter can be customized for production from 0.5-3.0mm.
The above is the answer to the question about the characteristics of lead-free solder wire and whether the smoke of the solder wire is toxic to friends. When using leaded solder wire, you must work in a ventilated environment and take protective measures. If you are working in the same place for a long time, it is best to install an exhaust fan. However, if there are no special requirements, it is best to choose lead-free solder wire.
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