1, when the brazing metal and solder contain toxic metal components to stringent protective measures, so that the operator poisoning

These metals include Be, Cd, Pd, Zn.
2, Be in atomic energy, aerospace and electronics industry application value is high, but it is toxic,  Welding Wiresshould pay special attention to the safety of anti-

Protection measures. Be mainly inhaled through the respiratory tract and skin damage from the body slow speed, short-term inhalation of a large number of

Can cause acute poisoning, inhalation of BeO and other insoluble compounds can cause chronic poisoning, beryllium disease, a few years after the onset, mainly for the call

Respiratory tract lesions. Brazing of beryllium and beryllium oxide, preferably in a closed ventilation equipment, and should have purification devices to reach the required standard

Prospective only from the outdoors.
3, Cd is usually in order to improve Brazing Alloy process to join in the solder elements, volatile when heated, from the respiratory and digestive

Road inhalation, the savings in the kidney, intrahepatic, and more, and excreted in the bile, short-term inhalation of Cd dust or vapors can cause acute

Poisoning, long-term, low-concentration exposure to Cd smoke vapor, can cause emphysema, kidney damage, olfactory disorder and osteomalacia psychosis

.
4, Pb is the main component of the soft solder, heated to 400 ~ 500 ℃, can produce large amounts of Pb vapor in the air quickly

Generate lead oxide, Pb and its compounds have similar toxicity, mainly in the form of soot vapor to enter the body through the respiratory tract when brazing

Can also be absorbed through the skin wound.
Pb vapor poisoning is usually chronic poisoning, mainly as neurasthenic syndrome, digestive disorders, anemia, peripheral

Neuritis, kidney, liver and other organ damage. Current provisions of the air of workplace maximum allowable concentration of lead smoke 0.03mg/m3

The lead dust 0.05mg/m3.
6, Zn and its compounds ZnCl2 brazing, volatile Zn and ZnCl2 will generate zinc smoke inhaled can cause metal fume fever

(Metal fume fever), symptoms are trembling, fever, sweating, nausea, headache, limb weakness. Exposure to ZnCl2 smoke

Mist may cause lung damage, contact with ZnCl2 solution may cause skin ulcers. Therefore, to prevent smoke exposure to the human body, must be applied to individual

Protective equipment and good ventilation, when the skin is touched ZnCl2 solution requires a lot of water to flush the affected area.
7, the use of fluoride-containing flux must be well ventilated conditions brazing, or use of personal protective equipment

. When the fluoride flux dip brazing, the exhaust system must ensure that the environmental concentrations within the provisions of the existing national

Specify a maximum allowable concentration for 1mg/m3.
8, the dangers of fluoride on the human body is mainly manifested as bone pain, osteoporosis, or deformation, severe cases spontaneous fractures

. The damage to the skin, itching, pain, and eczema.
To clean metal parts before brazing, the use of cleaning agents, including organic solvents, acids and alkalis and other chemicals

Toxic vapor would evaporate during the cleaning process, requiring a well-ventilated and meet the state requirements to ensure the safety of the operator's

Whole.