Monovalent gold cyanide-free gold electroplating bath based on alkaloid compound coordination and application thereof
A cyanide-free gold plating and alkaloid technology, applied in the field of cyanide-free gold plating, can solve the problems of stress brittleness, unstable plating solution, and sulfur inclusions in the coating layer, and achieve the effects of avoiding sulfur inclusions, golden appearance and good bonding force.
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[0030] A monovalent gold cyanide-free gold plating solution based on alkaloid complex coordination, with a pH of 8.5 to 12.7, including monovalent gold salt, complexing agent I, complexing agent II, pH buffer, wetting agent and additives;
[0031] The monovalent gold salt is a sodium sulfite solution containing monovalent gold, which is a concentrated solution. The mass concentration of monovalent gold ions in the concentrated solution is 10 to 100 g / L. After the concentrated solution is added to the electroplating solution, the electroplating solution The mass concentration of monovalent gold ions is 0.4-3.4 g / L.
[0032] At present, there is no solid medicine of sodium gold sulfite for sale on the market. Taking the mass concentration of monovalent gold ions as 10g / L as an example to configure the above concentrated solution, the steps are as follows:
[0033] ①In a 500mL beaker, add 20.8g of chloroauric acid (containing about 10g of gold) and 200mL of deionized water to di...
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