Cyanide-free gold plating because of its strong corrosion resistance, good resistance to change, at the same time the gold coating has a variety of colors, can be widely used in jewelry, luxury goods, art, etc. At the same time, it has good electrical conductivity, easy to weld, high temperature resistance, and certain wear resistance. Gold plating is widely used in the long-term stability of performance parameters of precision instruments, clocks, integrated circuits, hardware, bathroom, military products and other occasions.
Without cyanide plating process allows the current density and current rate is higher, the same condition productivity may be increased by more than 15%, compared with similar technology, cost was reduced by 50% - 60%, in terms of processing result, excellent dispersion ability, high density, can fully improve the technical performance indicators of the product, and can satisfy the special field of special technical requirements of the plating layer. And safety, energy conservation and environmental protection, so countries around the world have issued the corresponding policies, the use of cyanogen-free gold plating instead of the traditional gold-plating process.
Titanium alloy has the characteristics of anti-fracture and anti-fatigue, non-magnetic, high melting temperature and small thermal expansion coefficient. It is widely used in aerospace, chemical industry, electric power, military industry, daily production equipment and other industrial production, and occupies an important position in the national defense industry.
For gold plating on titanium alloy, a complete pre-plating layer is essential. On the one hand, the bonding force of the plating layer is increased; on the other hand, the harmful metal impurities such as copper ion and nickel ion are effectively reduced and prevented from entering the main plating solution to ensure that the gold ion content in the plating solution is within the normal range. Cathode mobile agitation, continuous filtration, the PH value of the gold plating solution should be strictly controlled, pay attention to adjust the PH value and specific gravity, regular analysis of gold ion content in the gold plating solution, timely replenishment, to ensure that the content in the process range, the deposition rate and appearance of the coating has important significance.
Cyanogen free environmental gold plating on titanium alloy results uniform, smooth, uniform color, no blistering, charring and other harmful defects. Thermal vibration test method, heating to 350 degrees Celsius, 30 minutes after the heat preservation into cold water as a detection method, with 10 times magnifying glass inspection, no bubbling layer, peeling phenomenon, good adhesion, the electroplating layer combination is good.
