Solder is plus lead plus flux poisonous

Solder wire is toxic to humans.

The general use of solder because of the low melting point, containing lead 60%, containing about 40% tin, so the solder itself is toxic. And most of the solder on the market are hollow, filled with rosin, soldering rosin melting inside the solder, a slight white smoke. This smoke is somewhat slightly toxic, the most harmful, is the lead inside the smoke produced. Lead smoke in GBZ2-2002 in the limit value is very low, very toxic, need to focus on protection.

In the welding process, there will be other harmful substances, such as: acetaldehyde, rosin acid, isocyanates, nitrogen oxides, sulfides, hydrocarbons and some heavy metals, etc., flying in the air. It invades into human liver, lung, cardiovascular and blood through the respiratory tract. Long-term excessive inhalation of such substances will damage the human nervous system, digestive system, blood system, etc., resulting in neurasthenia, polyneuropathy and encephalopathy and other diseases. General toxic substances, the impact will not be very large, you can rest assured that the welding, small factories are usually done with a smoking instrument (such as white light FA-400 smoking instrument, 493 smoking instrument) to smoke away, the conditions of the factory have a professional dust, smoke exhaust pipeline, and in the pipeline is installed with purification and processing equipment, with this approach has been more thorough effect, the human body can be basically negligible damage.

As for the size of the harm to the body, depending on what is used in the solder or flux. In fact, the lead-free soldering process has been widely used in the country, there are many manufacturers of lead-free products, our country has also introduced relevant regulations (China's Ministry of Information Industry, "Electronic Information Products Production Pollution Prevention and Control Management Measures," March 1, 2007 ban on lead decision), more and more production plants in the product and production environment to implement environmental protection, health business model, electronic product production and soldering on the personal Damage to the production of electronic products welding has been a good solution.