Hazards of electric welding harmful gases

1. Harm of oxygen. Ozone mainly stimulates the respiratory tract and lungs of the human body. Ozone concentration exceeds a certain limit, especially in sealed container welding and poor ventilation, can cause bronchitis, cough, chest tightness, loss of appetite, systemic pain and other symptoms. The effect of ozone on human body is reversible, and it can be recovered after disengagement.

2. Harm of nitrogen oxides. The harm of nitrogen oxides to human body is mainly to stimulate the lungs. Nitrogen oxide poisoning is a systemic disease mainly caused by acute respiratory system damage. The main symptoms of chronic nitrogen oxide poisoning are neurasthenia, such as insomnia, headache, loss of appetite and weight loss. In addition, it can also cause chronic bronchitis and skin allergy and tooth erosion. When severe poisoning occurs, the symptoms of pulmonary edema, dyspnea and collapse can occur if the cough is aggravated.

Carbon monoxide poisoning. Carbon monoxide is a kind of asphyxiating gas. Its toxic effect on human body is due to carbon monoxide inhaled through the respiratory tract, which makes oxygen transport in the body or block the function of oxygen absorption, resulting in tissue hypoxia, a series of symptoms and signs of hypoxia. Carbon monoxide enters the human body and combines with hemoglobin to form carboxyhemoglobin, which weakens the ability of blood to carry oxygen and causes tissue necrosis due to hypoxia. Carbon monoxide can suffocate, but it will not happen in welding. When welding, carbon monoxide is mainly manifested as a chronic effect on people, long-term inhalation of low concentration of carbon monoxide, can appear headache, dizziness, pallor, limb weakness, weight loss, general discomfort and other neurasthenia syndrome.

(4) hydrogen fluoride poisoning. Inhalation of high concentrations of fluoride and hydrogen fluoride gas or vapor, can immediately produce eye, nose and respiratory mucosa irritation symptoms, causing nasal and mucosal congestion, dryness and nasal ulcers, severe bronchitis and pneumonia can occur. Long-term exposure to hydrogen fluoride can lead to osteopathy, which is characterized by bone thickening (i.e. osteosclerosis, spinal column, pelvis, etc.).