Application of non-cyanide environmental protection gold plating process on titanium alloy
Cyanide-free gold plating is widely used in jewelry, luxury goods, arts, etc. due to its strong corrosion resistance and good resistance to deformation. At the same time, it has good conductivity, easy welding, high temperature resistance, and a certain degree of wear resistance. Gold plating is widely used in occasions where performance parameters such as precision instruments, clocks, integrated circuits, hardware, sanitary ware, and military products are stable for a long time.
The current density and current rate allowed by the cyanide-free gold plating process are higher, and the productivity can be increased by more than 15% under the same conditions. Compared with similar technologies, the cost is reduced by 50%-60%. In terms of processing results, it has excellent dispersibility. The high density can comprehensively improve the technical performance indicators of the product, and can meet the special technical requirements of the gold plating layer in the special field. In addition, it is safe, energy-saving and environmentally friendly, so countries around the world have issued corresponding policies to adopt cyanide-free environmental protection gold plating instead of traditional gold plating process.
Titanium alloy has the characteristics of anti-fracture and fatigue resistance, non-magnetic, high melting temperature, and small thermal expansion coefficient. It is widely used in aerospace, chemical industry, electric power, military industry and daily production equipment and other industrial production, occupying an important role in the defense industry status.
For gold plating on titanium alloys, a complete pre-gold plating layer is indispensable. On the one hand, it is to increase the bonding strength of the gold plating layer. On the other hand, it is effective to reduce and prevent harmful metal impurities such as copper ions and nickel ions from entering the main gold plating solution. Make sure that the gold ion content in the gold plating solution is within the normal range. Cathode moving and stirring, continuous filtration, the PH value in the gold plating solution should be strictly controlled, pay attention to adjust the PH value and specific gravity, regularly analyze the gold ion content in the gold plating solution, make a timely supplement, ensure that the content is within the process range, the deposition rate of the coating And appearance has an important meaning.
The application of cyanide-free environmental protection gold plating on titanium alloy results in a uniform, smooth, uniform color, no blistering, scorching and other harmful defects. Thermal vibration test method, heating to 350 degrees Celsius, holding for 30 minutes, immersed in cold water as the detection method, inspected with 10 times magnifying glass, no blistering and peeling, good adhesion, and good adhesion of the plating layer.
Through the inspection of the plating layer, it is proved that the gold plating on the titanium alloy without cyanide environmental protection gold plating process can completely replace the traditional gold plating process and realize the environmental protection production.