Normally, welding workers have taken corresponding protective measures during work, but even if these protective measures still cause some damage to the human body, Oita can be classified.

1. Strong light 2. High temperature 3. Exhaust gas 4. Toxic metal 5. Electromagnetic wave 6. Work safety.

Strong light - can be divided into visible light. Invisible light (infrared ultraviolet light)

Light radiation during welding - high radiation visible light is strongly irritating to the eyes. Short-term vision loss caused by ultraviolet radiation - is invisible light caused by corneal absorption of radiation caused by the pain of keratitis and conjunctivitis. Glaucoma will cause regular.

Infrared radiation - the invisible light causes the eye's aqueous humor and lens to be heated to make the lens turbid. Burns the retina. Long-term vision may be affected, even lead to cataract

Infrared is divided into three bands according to its wavelength: IR-A (Infrared A) wavelength is from 760nm to 1400nm, IR-B (Infrared B) band is from 1.4um to 3um, IR-C (Infrared C) wavelength It is 3um~1mm.

The damage caused in the infrared band is mainly cataract, retina and corneal burns, and the thermal pressure generated by thermal radiation under low intensity light sources

Retinal damage

In the wavelength range of 0.4um to 1.4um, the retina has a certain absorption rate, if the exposure is too much, it will cause retinal burns, so it is also called "retinal injury area."

Corneal injury

The absorption rate of the cornea is very low in the IR section of the IR-A (infrared A) band (<1.4 um). When the wavelength is close to 1.4 um (IR-B infrared B and IR-C infrared C band), the cornea absorbs light. Increased sex (Figure 8). The cornea and aqueous humor will absorb radiant heat energy that is radiated into the eyes. If the exposure is too large, it will cause burns [2]. In addition, the cornea is quite sensitive to temperature, and high-powered infrared rays can cause intense pain in the eyes.

The cause of cataract

In the short-time exposure of a high-power light source, the thermal energy transmitted by the iris is the main cause of cataract. As for the long-time exposure of a low-energy light source, the cataract is caused by the direct absorption of heat energy by the crystal. (like egg white cooked)

The effect of UV on the skin.

Ultraviolet light with a wavelength less than zzonm is almost completely absorbed by the skin keratinized layer. Ultraviolet light with a wavelength of Zponm has the strongest effect on the skin and can cause erythema reaction. Subject to strong UV radiation, it can produce diffuse erythema, itching or burning sensation, and can form vesicles or edema. Systemic symptoms include headache, fatigue, and overall discomfort.

Ultraviolet rays can cause skin cancer.

Some welders don't use masks. They only wear one pair of sun glasses. In the south, there are cases of facial skin cancer. The facial features are all gone.

China Labor Insurance Network