What harm will the body be caused by welding?

Welding is a very hard job, and it has a lot of 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.

1. 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 retina damage caused by heat pressure generated by the heat radiation under low intensity light source is within the range of wavelength 0.4um to 1.4um, and 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."
Damage to the cornea The cornea absorbs very slowly in the IR section of the IR-A (infrared A) band (<1.4 μm). When the wavelength is close to 1.4 μm (IR-B infrared B and IR-C infrared C band), the cornea The light absorption becomes larger (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.
Causes of Cataract Occurrence When the high-power light source is exposed for a short period of time, the thermal energy transmitted by the iris is the main cause of the cataract. As for the long-time exposure of the low-energy light source, the crystal directly absorbs heat energy and causes cataracts. (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 wear only one pair of sun glasses. In the south, there are cases of facial skin cancer. The features are gone.
Second, the high temperature --- high temperature first cause a lot of sweat. Body electrolytes and vitamins quickly discharged. In Chinese medicine. High temperature hurt the lungs. High temperature also causes male sperm quality is bad.
3. Exhaust gas --- Asia gas itself is non-toxic, but it is suffocating. Work in a confined space should pay attention to ventilation.
3. The oil on the metal during the welding process, glue, paint, etc. is extremely unhygienic.
4. Toxic metals - including heavy metals. Often vaporized or precipitated during welding by workers breathing inhalation and skin absorption.
Heavy metals can enter the body through breathing or diet, causing a variety of acute and chronic symptoms of poisoning, such as: inhalation of high-temperature oxide fumes such as copper, zinc and other metals may cause symptoms of fever; cadmium in the body can replace the bone of calcium Causing bones to become brittle and painful; lead can affect hematopoietic function resulting in anemia, but also lead to neurological symptoms such as ciliary wrist syndrome and abdominal cramps; manganese can cause Parkinson's disease; mercury compounds cause teratogenic and neurological symptoms, etc. .

Chronic poisoning:

A. Because copper is an essential element of the human body, it is quickly discharged through urine and bile after absorption. The current medical literature rarely reports chronic copper poisoning. However, some people believe that long-term exposure of excessive copper or long-term use of copper meal and water pipes may cause chronic liver disease. Long-term inhalation of copper dust and fumigated smoke can lead to perforation of nasal hernia, granulomatosis of the lungs, pulmonary spray (Spine) and lung cancer.

B. Wilson Disease: A disease of congenital abnormal copper metabolism. Copper accumulates on the nucleus, viscera, and cornea of ​​the brain and causes health damage, also known as hepatolenticular degeneration. Over a long period of time, there will be permanent brain lesions and cirrhosis after puberty.