(1) Welding of Industrial Hygiene and the main object of study is  Welding Wires, which of Industrial Hygiene and the biggest problem the next arc welding, submerged arc welding, electroslag welding at least.
(2) The main harmful factors of the coated electrode manWelding Material, carbon arc gouging and CO2 gas shielded arc welding of soot generated in the welding process, welding fumes. Electrode manual arc welding. And carbon arc gouging, the restricted space in the operating environment for a long time (boilers, cabin, sealed containers and pipelines, etc.) welding operation, and bad for Health Protection will have respiratory hazard, and in severe Yi the risk of electric welding pneumoconiosis.
 (3) toxic gas is a gas welding and plasma arc welding of a major harmful factors in high concentration can cause poisoning symptoms. In particular, ozone and nitrogen oxides, they arc high-temperature radiation acting on oxygen and nitrogen in the air. (4) arc radiation is all out arc common harmful factors, and the resulting electro-optic eye disease is a special occupational diseases in the next arc. Arc radiation will damage the skin, welders suffering from skin diseases such as dermatitis, erythema and small blisters. In addition, damage to the cotton fiber.
(5), gas tungsten arc welding and plasma arc welding, the welder to set up high-frequency oscillator to help arc, so the existence of harmful factors - high-frequency electromagnetic fields, especially high-frequency oscillator work longer welder (such as Some factories homemade welding machine). The high frequency electromagnetic field will welders suffering from diseases of the nervous system and blood system.