In the bright nickel plating process, the use of nickel plating brightener is one of the key factors, they are usually divided into primary brightener and secondary brightener, each of which has its own specific function and role.
1. Primary brightener:
Function: Primary brighteners are mainly used to improve the priming effect of the plated layer and provide preliminary brightness. They can significantly improve the ductility and leveling of the plated layer, making the surface of the plated layer smoother and more uniform.
Mechanism: This type of nickel plating brightener Ni-301A generally produces brightening and leveling effects by adsorbing on the surface of the workpiece, adjusting the potential distribution and changing the crystal growth.
Characteristics: Primary brightener has small molecules, which can cover the surface of the workpiece well during the plating process and form an initial smooth layer.
2. Secondary brighteners:
Role: Secondary brightener is mainly used to further enhance the surface brightness of the plated layer, refine the crystalline structure, so that the plated layer to achieve the effect of mirror bright.
Mechanism: This type of nickel plating brightener Ni-301B is usually used to further optimize the electrochemical environment and change the lattice arrangement on the electrode surface by playing a synergistic role with Ni-301A, which is formed on the basis of the primary brightener.
Characteristics: Secondary brighteners usually have larger molecules and have a more pronounced effect, but need to be combined with primary brighteners to achieve the right effect.
These two types of brighteners need to be used together to obtain a good coating: the primary brightener provides the initial smoothness and leveling effect as a base, while the secondary brightener further enhances the brightness and surface quality of the coating. By optimizing the ratio and conditions of use of these two brighteners, the surface quality requirements of different products can be met. Through years of tests and adjustments, Bigely engineers have obtained a suitable ratio of the two brighteners Ni-301A and Ni-301B for nickel plating, which can achieve the speed of 5-minute polishing and good brightness of the plated layer.
If you are interested in the ratio of nickel plating brightener Ni-301, please feel free to contact us.
