ã€China Aluminum Network】 Aluminum alloy products are widely used in aerospace, electronics, automobiles, electrical appliances, building materials, etc. due to their advantages of small density, excellent thermal conductivity, and easy processing. In the automotive industry, aluminum wheels have gradually replaced steel wheels. The protection of aluminum wheels and prolonged service life is an essential process for the automotive industry. Plating or spraying of aluminum alloy wheels is a common method of protection and decoration. Because aluminum is a lively amphoteric metal, aluminum alloy has certain difficulties in electroplating on its surface because of its own chemical and physical properties. Therefore, before zinc plating, the surface of zinc or zinc alloy must be covered with a layer of small, dense and densely distributed zinc and zinc alloy layers. Some people compare this process with the “nails†necessary for aluminum alloy plating, and the coating can be applied. Stuck firmly on the surface of the aluminum alloy. Due to the high hardness requirements of aluminum wheels, the silicon content of the material is relatively high, and the traditional zinc-iron binary alloy cyanide-free zinc deposition process cannot meet the requirements of the bond strength. Therefore, the traditional cyanide zinc deposition process has dominated the market. However, with the increasing emphasis on environmental protection by the society and the increasingly strengthened control and control of the country’s electroplating of dangerous goods, especially after the chemical explosion accident in Tianjin, issues such as the storage, transportation, and use of cyanide have aroused widespread public concern. As the electroplating industry has shifted to cleaner production, the elimination of cyanide process has become a pressing task. In response to the country's clean production call, Sanfo has avoided the use of cyanide and eliminated the cyanide contamination of water bodies. After developing a non-cyanide high-density copper plating process (SF-8639), Sanfo launched the zinc deposition process again. The challenge was to develop a cyanide-free zinc deposition process for the SF-8300 quaternary alloy system for aluminum alloys, especially aluminum wheels. Due to the high hardness requirements of aluminum wheels, the silicon content of the material is relatively high, and the traditional zinc-iron binary alloy cyanide-free zinc deposition process cannot meet the requirements of the bond strength. Therefore, the traditional cyanide zinc deposition process has dominated the market. However, with the increasing emphasis on environmental protection by the society and the increasingly strengthened control and control of the country’s electroplating of dangerous goods, especially after the chemical explosion accident in Tianjin, issues such as the storage, transportation, and use of cyanide have aroused widespread public concern. As the electroplating industry has shifted to cleaner production, the elimination of cyanide process has become a pressing task. In response to the country's clean production call, Sanfo has avoided the use of cyanide and eliminated the cyanide contamination of water bodies. After the development of a non-cyanide high-density copper plating process (SF-8639), SanFung initiated the process again. The challenge was to develop a cyanide-free zinc deposition process for the SF-8300 quaternary alloy system for aluminum alloys, especially aluminum wheels. For this revolutionary initiative, starting in August 2014, Sanfo R&D and technical service team began to use SF-8300 cyanide-free zinc-depositing technology on a large-scale wheel hub plating company, through repeated process verification and bath commissioning. The trial production began in late August. The finished product passed the cold and hot cycle test, CASS test, and saw blade test, all of which met the standard! Up to now, the process has been undergoing normal production for 18 months. Technical improvements have been made several times during the process. Each fine adjustment has resulted in an increase in the yield of aluminum alloy wheels. By February 2016, the cyanide-free zinc incineration line produced a total of 14,057 wheels. Among them, after a fine-tuning in December 2015, the first-time yield was significantly increased to 97%, and monthly production was 2,286! The technological level has reached the standard of traditional zinc cyanide-containing zinc. It can be said that Sanfo SF-8300 cyanide-free zinc removal process has won a very beautiful victory in the cyanide-free battle of aluminum alloy plating.