The influence of different types of gold plating solutions on the thickness of the gold plating layer is mainly reflected in the following aspects:
deposition rate
Different types of gold plating solutions have different deposition rates, that is, the thickness growth rate of the gold plating layer per unit time. Generally speaking, acidic gold plating solutions have a faster deposition rate, while alkaline gold plating solutions have a slower deposition rate. This is because the reduction reaction rate of metal ions on the cathode in acidic gold plating solutions is faster, while the reduction reaction rate of metal ions on the cathode in alkaline gold plating solutions is slower.
Coating structure
The plating structures produced by different types of gold plating solutions are also different. The coating formed by acidic gold plating solution has a loose structure and high porosity, which is beneficial to lubrication and reduction of friction coefficient. The coating structure plated by alkaline gold plating solution is denser and has lower porosity, which is beneficial to improving corrosion resistance and mechanical properties.
Coating hardness
The hardness of the coating produced by different types of gold plating solutions is also different. The hardness of the coating produced by acidic gold plating solution is lower, while the hardness of the coating produced by alkaline gold plating solution is higher. This is because the reduction reaction rate of metal ions on the cathode in the acidic gold plating solution is faster, resulting in more metal lattice defects, while the reduction reaction rate of metal ions on the cathode in the alkaline gold plating solution is slower, which is conducive to the formation of more complex lattice defects. Complete metal lattice.
Corrosion resistance
The corrosion resistance of the coatings produced by different types of gold plating solutions is also different. Generally speaking, the corrosion resistance of coatings plated from acidic gold plating solutions is poor, while the corrosion resistance of coatings plated from alkaline gold plating solutions is better. This is because the reduction reaction rate of metal ions on the cathode in the acidic gold plating solution is faster, resulting in more metal lattice defects, while the reduction reaction rate of metal ions on the cathode in the alkaline gold plating solution is slower, which is conducive to the formation of more complex lattice defects. Complete metal lattice.
To sum up, the influence of different types of gold plating solutions on the thickness of the gold plating layer is mainly reflected in the deposition rate, coating structure, coating hardness and corrosion resistance. In the actual production process, it is necessary to select the appropriate type of gold plating solution based on specific usage requirements and process conditions to achieve the required gold plating layer thickness and quality requirements.
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