Hazard: (1) Metal smoke and dust hazards. The composition of welding fumes varies depending on the electrode used. The electrode consists of a core and a coating. During welding, a large amount of smoke and dust is generated at the same time when melting the electrode and the weldment. The main components are iron oxide, manganese oxide, silica, and silicate. The soot particles are diffused in the working environment and can easily be inhaled into the lungs. . Long-term inhalation can cause fibrous lesions in the lung tissue, which is called welder pneumoconiosis, and is often accompanied by manganese poisoning, fluorosis, and metal fume fever. (2) Toxic gas hazards. Under the effect of high temperature and strong ultraviolet rays generated during arc welding, a large amount of toxic gases such as carbon monoxide and nitrogen oxides will be generated around the arc region. (3) The hazard of arc radiation. Arc light generated by welding mainly includes infrared rays, visible light, and ultraviolet rays. Ultraviolet rays mainly cause harm to the human body through photochemical effects. It damages glasses and exposed skin, causing keratoconjunctivitis (electrooptic ophthalmia) and cutaneous erythema.

Protective measures: Improve ventilation at the workplace. Ventilation can be divided into natural ventilation and mechanical ventilation, where mechanical ventilation dust removal and detoxification are effective. In the case of welding inside a closed room with poor natural ventilation, mechanical ventilation must be provided. Strengthen personal protection. Workers must use appropriate protective glasses, masks, masks, gloves, white protective clothing, insulated shoes, and must not wear short-sleeved clothing or roll up sleeves. If you work in a closed container with poor ventilation, wear a protective helmet with air supply.

China Labor Insurance Network