With social requirements, environmental protection projects are increasingly on the agenda for process treatment. Therefore, many manufacturers are paying more and more attention to environmental protection issues for surface heat treatment. Based on our understanding, China Standard Parts Network would like to share relevant information here. Related process flows of environmentally friendly electroplating surface treatment.
Environmentally friendly electroplating surface treatment process
Although there is still no definite standard for the definition of environmentally friendly electroplating surface treatment, generally speaking, environmentally friendly electroplating means that it will not harm the environment and human safety during the production process; some foreign institutions also stated that environmentally friendly electroplating must comply with The following principles: increase safety, reduce waste and reduce environmental pollution. Therefore, based on multiple definitions and standards, environmentally friendly electroplating actually refers to a safe and low-pollution electroplating process. In the surface treatment industry, the industry can achieve environmentally friendly plating by avoiding the use of several electroplating processes, including cyanide-containing electroplating processes and electroplating processes containing hexavalent chromium components.
Electroplating surface treatment process harmful to health
The cyanide in the cyanide-containing electroplating surface treatment process is a compound of carbon and nitrogen. The most toxic one is the cyanide radical of the cyanide compound. When the cyanide radical combines with hydrogen in water, hydrogen cyanide will be formed. Since hydrogen cyanide is a gas and can diffuse in the air, it is very harmful to the human body. As for hexavalent chromium, it is highly toxic. When accidentally entered into the human body, it can be absorbed by the human body and easily cause cancer. Therefore, if you want to achieve environmentally friendly electroplating, you must avoid using these two electroplating processes.
Environmentally friendly electroplating surface treatment process
Chemical degreasing - water washing - acetone soaking - water washing - chemical roughening, water washing sensitization - water washing - activation - reduction - chemical copper plating - water washing bright sulfate copper plating - water washing - Bright sulfate nickel plating - water washing - bright chrome plating - water washing, drying and sending for inspection.
Warm reminder: The pre-treatment process for product electroplating is very important. The general traditional process uses acid to process the workpiece, which causes serious environmental pollution and poor working environment. At the same time, the biggest drawback is the residue after pickling and rust removal of parts with complex structures. Acid is difficult to rinse away. After the workpiece is electroplated, corrosion will appear along the cracks within a short period of time, destroying the surface of the electroplated layer and seriously affecting the appearance and internal quality of the product. After ultrasonic cleaning technology is applied to pre-electroplating treatment, it can not only quickly peel off dirt on the surface and gaps of objects, but also the spray coating of electroplated parts is firm and will not rust back.
