do you know?
Illegal electroplating equipment manufacturers produce because of imperfect pollution treatment mechanisms.
It is extremely harmful to the environment and the health of surrounding people:
1. Air pollution:
In electroplating production, a large amount of chemicals such as strong acids, strong bases, salts, and organic solvents are used, and a large amount of toxic and harmful gases are emitted during the operation. For example, hydrofluoric acid fumes in the air, and the vapor is very corrosive and toxic; when electroplating chromium, a large amount of chromium mist will be emitted. Chromium compounds can cause skin ulcers, anemia, nephritis, neuritis and other diseases, and It can cause cancer and induce genetic mutations.
2. Water pollution:
The main source of zinc in electroplating and metal processing industry wastewater is the drag liquid from electroplating or pickling. The contaminants are transferred to the rinsing water through the metal rinsing process. The pickling process involves immersing the metal (zinc or copper) in strong acid to remove surface oxides, and then immersing it in a brightener containing strong chromic acid for brightening treatment. This wastewater contains a large amount of hydrochloric acid, heavy metal ions such as zinc and copper, and organic brighteners, which are highly toxic. Some also contain highly toxic substances that are carcinogenic, teratogenic, and mutagenic, and are extremely harmful to humans.
3. Dust hazards:
Most hardware workpieces must be ground, mechanically polished, etc. before electroplating; in addition, in order to remove slag, molding sand, oxide scale and other impurities on the surface of castings, forgings or parts after heat treatment, sandblasting is also required. These operations will produce a large amount of dust that may contain silicon, chromium, aluminum, iron, copper, linen, etc.
4. There is danger of explosion:
Organic solvents are often used to degrease and degrease workpieces in electroplating production. Commonly used organic solvents include gasoline, kerosene, acetone, benzene, trichlorethylene and carbon tetrachloride. In addition, paint strippers are also used to remove old coatings. , use varnish (sealing) paint to seal the coating, etc. The paint stripper contains a large amount of methylene chloride and other organic solvents. The varnishing (sealing) paint also contains a variety of organic solvents. Gasoline, kerosene, benzene and Some other organic solvents have very low flash points and are easily volatile in the air. When the mixture of vapor and air reaches the lower explosion limit, fire and explosion accidents will occur when encountering ignition sources such as sparks.
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