Is there any poison in the solder? Experts say so, I am relieved...

Is the soldering iron solder poisonous?

do not worry. The EU's restrictions on harmful substances are temporarily exempted from solder. Although lead is toxic, it refers to entering the blood, engaged in traditional printing (using lead), acid lead storage batteries, and professional processing of lead is a high-risk occupation. Wastewater from enterprises that pollute drinking water and drink into the human body can also cause high blood lead. How much does lead evaporate when using solder? How much can you inhale? can be ignored.

Some netizens said that he used electric soldering iron in the printed circuit board factory for a whole year. They all felt that the body began to feel uncomfortable. The abdomen was a little swollen, and the solder was poisonous? Is it lead poisoning?

In fact, this depends on the lead solder wire used in the soldering iron soldering at work or lead-free, and it is necessary to check the blood lead regularly. If there is no exceeding the standard, there will be no problem at all. Is the solder poisonous? Normally, if the protection and raw material procurement are carried out in accordance with national standards, the solder will not cause significant harm. Basically, all of them are using lead-free products.

Lead is a toxic substance. Excessive absorption by the 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 a commonly used solder. It has good electrical conductivity and low melting point, so it has been used in welding for a long time. Its toxicity is mainly from lead. Lead fumes from solder can easily lead to lead poisoning.

Metal lead may produce lead compounds, which are all classified as hazardous substances, and lead in the human body affects the central nervous system and the kidneys. The environmental toxicity of lead to some organisms has been widely confirmed. A blood lead concentration of 10 μg/dl or more will produce a sensitive biochemical effect. If long-term exposure causes blood lead concentration to exceed 60-70 μg/dl, clinical lead poisoning will occur.

Lead must be toxic. Don't say that he is not big. It is a general metal. If it is too much, it will be poisoned. When soldering, there will be smoke, which contains an element harmful to the body. When working, it is best to wear a mask, but it will still be a little more or less. Of course, if you can use lead-free solder wire, it will be safer than lead.

Is lead-free solder poisonous?

Solder wire with soldering iron solder. Although it is mainly tin, it also contains other metals. Mainly divided into lead and lead-free (ie environmentally friendly). With the introduction of the EU ROHS standard, more and more PCB welding factories have chosen lead-free environmental protection type, and lead solder wire is slowly being replaced. It is not environmentally friendly. Lead-free solder paste, lead-free tin wire, lead-free tin bar is currently the main product on the market.

To put it simply: the solder that is harmful to general use is low in melting point, containing 60% lead and 40% tin, so the solder itself is toxic. Most of the solder on the market is hollow and contains rosin, so the gas you are talking about is estimated to be volatilized when the rosin in the solder melts during welding. The gas volatilized by rosin is also slightly toxic, and this gas is quite unpleasant. The main hazard of soldering during soldering is lead smoke, even if it is lead-free solder, which contains a certain amount of lead. Lead smoke in GBZ2-2002 has a very low limit and is very toxic, requiring special protection. Due to the damage to the human body and the environment caused by the welding process, in Europe, the protection of the welding workers and the protection of the environment have been enforced in the form of legislation, and welding without the protective measures is not allowed. There are clear regulations on the treatment and protection of pollution generated in the production process in the ISO14000 standard.

Tin has lead. In the past, lead in the solder wire classified the solder as an occupational hazard position (in the national occupational disease list); now our general enterprises use lead-free solder wire, the main component is tin, the disease prevention and control center measured It is tin dioxide; it is not in the national occupational disease list. Lead free (leadfree) Generally speaking, lead smoke will not exceed the standard, but there are other hazards in solder. For example, flux (rosin) has certain hazards, depending on the specific situation. Employees can usually look at the label of the tin that is distributed, which category it belongs to, so that it can be verified and required to rectify the enterprise (you can give advice to the factory internal union). If the tin is matched with lead, it is definitely harmful to the body. Over time, they accumulate in the body and are highly damaging to the nervous system.

Lead-free solder wire is environmentally friendly, but lead-free solder wire is also harmful to the human body. Lead-free solder wire has low lead content and is not lead-free. Compared with lead-containing solder wire, lead-free solder wire is environmentally friendly and human. The pollution is smaller than that of lead. The gas generated during soldering is toxic and is produced by gas vapor such as rosin oil or zinc chloride.

How to prevent the soldering iron solder wire from being poisonous?

First of all, the PCB factory should use ROHS tin wire when soldering soldering components with soldering iron, and do a good job of prevention: such as wearing gloves, masks or gas masks, pay attention to ventilation in the workplace, good exhaust system, and pay attention to cleaning after work. The method of drinking milk can also prevent lead toxicity in solder.

1. Take a break and rest time, usually take 15 minutes to rest for 1 hour, because the resistance is the worst when fatigue;

2. Eat less and drink more water. This eliminates most of the harmful substances absorbed during the day;

3. Drink mung bean soup or honey water before going to bed, this can reduce fire, and mung beans and honey can exclude a large amount of lead and radiation absorbed!

4. Can avoid radiation to avoid as much as possible, use less mobile phones;

5. You can make the soldering iron brighter, try to use the PPD welding head, so that the temperature is reached, you can use less welding oil and rosin to reduce the harm to the body;

6. When soldering solder, smoke as much as possible to the side of the edge, try to hold your breath;

7. Use more alcohol, brushing with alcohol for a while will have almost the same effect;

8. Wash your hands;

9. Try to get up early and get up early to ensure adequate sleep. As long as you sleep well, impurities can be discharged with your body.

10. Work with a mask.