Author: MULAN –Plastic Molding Manufacturer
What are the harms caused by illegal plastic electroplating processing? The following editor will explain to you. One is air pollution: Plastic electroplating production requires a lot of chemicals such as strong acids, strong alkalis, salts and organic solvents, and a lot of toxic and harmful gases will be emitted during the operation. For example, hydrofluoric acid fumes in the air, and its vapor is very corrosive and toxic; a lot of chromium mist will be emitted during chromium plating, and chromium compounds can cause skin ulcers, anemia, nephritis and neuritis and other diseases. And have the effect of causing cancer and inducing gene mutation.
The second is water pollution: the main source of zinc in plastic electroplating and metal processing industry wastewater is the drag solution of electroplating or pickling. Contaminants are transferred to the rinse water through the metal rinse 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 long-face treatment.
The wastewater contains a lot of hydrochloric acid, zinc, copper and other heavy metal ions and organic brighteners, etc., which are highly toxic, and some of them also contain highly toxic substances that are carcinogenic, teratogenic, and mutagenic, which are extremely harmful to humans. The third is the dust hazard: most hardware workpieces must be polished, mechanically polished, etc. before electroplating; in addition, in order to remove slag, molding sand, scale and other impurities on the surface of castings, forgings or parts after heat treatment, it is necessary to carry out Sandblasting. These operations will produce a lot of dust that may contain silicon, chromium, aluminum, iron, copper and linen.
Fourth, there is a risk of explosion: in plastic electroplating production, organic solvents are often used to degrease and degrease workpieces. Commonly used organic solvents include gasoline, kerosene, acetone, benzene, trichlorethylene and carbon tetrachloride, etc.; The paint remover removes the old coating, and the coating is sealed with the varnish (sealing) paint, etc. The paint remover contains a lot of methylene chloride and other organic solvents, and the varnish (sealing) paint also contains a variety of organic solvents .Gasoline, kerosene, benzene and some other organic solvents have a very low flash point and are easily volatile in the air. When the mixture of vapor and air reaches the lower limit of explosion, fire and explosion accidents will occur when sparks and other ignition sources are encountered.