Toxic gases such as ozone, nitrogen oxides, acetaldehyde, rosin acid, sulfides, hydrocarbons, carbon monoxide, fluoride and chloride are often produced during the welding process. These gases are often harmful to human health.
1. Ozone: after the ozone in the welding area is inhaled by the human body, it mainly stimulates the respiratory system and nervous system, causing chest tightness, cough, dizziness, general weakness and do not want to eat and other symptoms.
2. Oxides: mainly N2O, NO, NO2 and N2O5 are reddish-brown gases, which are heavier than air and have 4-5 times the toxicity of NO. When exposed to water, they can be changed into nitric acid or nitrous acid and produce strong stimulation. Inhalation of high concentrations of nitrogen oxides in workers can cause acute asthma or emphysema, and long-term chronic effects can cause neurasthenia symptoms and chronic respiratory inflammation.
3. Carbon monoxide can easily combine with hemoglobin to form carboxyhemoglobin, which will lose the ability and function of carrying oxygen and cause tissue asphyxia. It has toxic effects on tissue cells of the whole body, especially on cerebral cortex. The carbon monoxide in welding mainly comes from the decomposition of carbon dioxide, so a large amount of carbon monoxide gas will be produced in the carbon dioxide shielded welding, and only a small amount of carbon monoxide gas will be produced in other arc welding.
4. When welding materials containing fluorine are involved in welding, trace HF gas may be generated. HF has strong stimulation. When welding smoke is serious, human body can produce pulmonary edema, bronchitis, lung cancer, asthma, eczema, skin allergy, respiratory tract infection and so on, especially disorder central nervous system, destroy digestive system, lead to complications and failure and death.
It can be seen that in the process of industrial welding production, it is necessary to take necessary air dust removal and purification measures, so as to ensure a clean working environment, reduce the occurrence of occupational diseases of workers, and improve the production quality and work efficiency.
