Is the solder wire toxic?
The solder wire is composed of tin alloy and auxiliary agent, the alloy composition is divided into tin lead, lead free auxiliary agent evenly perfusion to the tin alloy middle part.
Solder wire in the welding smoke is due to solder wire inside the flux and high temperature electric iron meet the gasification formed by the smoke, solder wire assistant contains rosin and chemical raw materials, long-term inhalation of adverse factors to the human experience, maintain ventilation will be good. The rosin in the solder wire is mainly composed of rosin anhydride and 80 percent of aromatic acid resin hydrocarbon about 5-6%, volatile oil and trace bitter substances, in the solder wire welding working temperature of 250 degrees of high temperature, some oxides can be dissolved into carbon dioxide.
Based on the above aspects, proper selection and control can achieve successful welding. Harmful gases such as sulfur dioxide, and itself of rosin ester kind of volatile gas and the county's, can cause mild stimulation to eyes, conditional enterprises can be mounted to the smoke purification system can improve the manual solder wire welding workers and working environment, eliminate the solder wire welding often produce some toxic substances and smoke, so as to ensure the solder wire not harm to people, so solder wire is no harm to people.
However, solder dust may cause tin pneumoconiosis, usually occupational hazards are relatively large impact on the respiratory tract, lung; If tin oxide, tin dioxide inhalation, according to the international chemical safety card: may produce mechanical stimulation of the respiratory tract, long-term repeated exposure, may damage the lung, lead to benign pneumoconiosis (tin pneumoconiosis). However, there is no direct reference to tin in the occupational hazard catalogue, which includes:
(1) lead and its compounds (lead dust, lead smoke, lead compounds, excluding tetraethyl lead)
Possible occupational diseases: lead and its compounds poisoning.
Industry, for example,
(1) heavy nonferrous metal smelting industry: tin ore furnace charging, tin ore fuming; Tin smelting, tin refining, tin mineralization, tin electrolysis.
(2) electrical machinery and equipment manufacturing: tin plating for wires and cables.
(3) electronic and communication equipment manufacturing industry: sintering of circuit substrates, tin lining of components, wave soldering of components, manual welding of components.
Operation protection: the operation must be in the ventilation environment, such as long-term operation in the same place is best to install exhaust fan.