Reasons why electroless nickel bath walls are easily plated with nickel
Author: Robby
Chemical nickel bath wall easily plated nickel is mainly due to the following reasons:
Plating solution composition ratio imbalance: chemical nickel plating solution consists of nickel salts, reducing agents, complex coordination agents, buffers and additives, etc. The ratio of each component has an important impact on the stability of the plating solution. If the proportion of components is out of balance, it may lead to nickel deposited on the tank wall.
Excessive impurities: The accumulation of impurities during the process will accelerate the deposition of nickel, leading to nickel deposition on the walls and bottoms of the bath.
Poor control of temperature and pH: chemical reaction is very sensitive to temperature and pH, any deviation will affect the stability of the plating solution, leading to nickel deposition on the tank wall.
Uneven temperature in the plating bath: During the production process, the temperature is higher near the heating bar, and if you do not pay attention to the stirring, it will lead to the local high temperature of the plating solution, which will lead to the precipitation of chemical nickel deposited on the wall or bottom of the bath.
Dust and solid particles: Airborne dust or solid particles may fall into the bath when production is stopped, triggering natural decomposition and resulting in nickel particles being deposited.
Broken bath liners: If the bath liner is broken, the base metal is exposed, which can lead to the deposition of electroless nickel on the metal.
Solution.
To avoid nickel deposition on the walls of the electroless nickel bath, the following measures can be taken:
Control the ratio of plating solution components: Ensure that the ratio of each component is correct to maintain the stability of the plating solution.
Reduce impurities: Minimise the introduction of impurities during the process and keep the plating solution clean.
Control temperature and pH value: Strictly control the reaction temperature and pH value to avoid deviation.
Stir the plating solution evenly: Stir the plating solution several times during the production process to keep the temperature even and avoid local high temperature.
Prevent dust and solid particles from entering: Cover the lid when stopping production to prevent dust and solid particles from entering the plating solution. The plating solution should be circulated and filtered during production and the bath should be cleaned regularly.
Check and replace the lining of plating bath: check the lining of plating bath regularly and replace the broken lining in time to reduce the loss of nickel salt.