What are the main harmful factors to equipment and human body during thermal spraying

       There are many harmful factors in the thermal spraying process, mainly including: harmful gases, dust, light radiation, radioactive elements, noise, high-frequency electromagnetic fields, and potential fire and explosion. These harmful factors have a great impact on human health, the normal operation of equipment and the environment. Therefore, while promoting the application of thermal spraying technology, we must attach great importance to corresponding safety protection measures.



    In thermal spraying, ozone (CO3) and nitrogen oxides (including N2O, NO, NO2, N2O3, and N2O5, etc.) are generated by the action of arc ultraviolet radiation or high-frequency electromagnetic fields. Ozone is a light blue gas with strong The pungent odor is generally fishy and sour. Nitrogen oxides in the air are mostly harmful to the human body in the form of nitrogen dioxide. Nitrogen dioxide is brown-red at room temperature and dark brown after heating. It has a special odor and is poisonous. The actual measurement shows that the concentration of ozone and nitrogen oxides in the vicinity of the manuscript spray gun is dozens of times or even hundreds of times more than the concentration specified by my country's reference health standard (0.2mg/m3). When nitrogen oxides and ozone coexist, the toxicity to the human body will be greater, and its toxic effect is 15 to 20 times higher than that of a single gas. The harm of ozone to the human body is mainly manifested in stimulating the respiratory system, which can cause symptoms such as dry mouth, cough, chest tightness, upper respiratory tract infection, chronic bronchitis, etc.; and nitrogen oxides also stimulate people's nerves, the main symptoms are neurasthenia, headache. , insomnia, loss of appetite, weight loss, etc.