The preparation method and sequence of the electroplating solution are critical, so make no mistake!

The preparation method of the electroplating solution, the order of adding the complexing agent and main salt, the problems that should be paid attention to when preparing the electroplating solution, and the maintenance and management of the electroplating solution.

Because the composition of the electroplating solution required for different types of coatings is different, the specific preparation methods are also different. It should be prepared correctly according to the specific electroplating solution preparation process and precautions.

However, since the preparation method and sequence of various electroplating solutions are roughly the same, the following basic requirements are usually followed:

1 The order of addition of complexing agent and main salt is very important

(1) After adding about 5% of the volume of distilled water to the plating tank, add the calculated amount of complexing agent and conductive salts and other chemicals gradually under stirring conditions to dissolve it in the water, and also deal with the plating solution Heat or cool down in time to promote the dissolution of all chemicals.

(2) Dissolve the calculated amount of the main salt chemicals in the above electroplating solution, or mix it into a paste with a small amount of distilled water in another container before adding it.

The addition of the main salt should be carried out after adding the complexing agent to fully ensure the dissolution and coordination of the main salt.

(3) Dissolve chemicals such as additives and brighteners in separate containers, and then add them to the above electroplating tuck.

(4) Add distilled water to the specified volume, adjust the pH value of the electroplating solution, filter, analyze and adjust, and conduct electrical treatment. After the test plating is qualified, it should be used normally.

2 Problems that should be paid attention to when preparing electroplating solution

(1) Operators should wear protective equipment against poison, acid and alkali.

(2) When preparing cyanide and other toxic electroplating solutions, strictly observe the safety operating procedures.

(3) The preparation of toxic electroplating solution must be carried out in a well-ventilated environment.

(4) Strictly implement the process procedure of electroplating solution preparation, and observe the order of preparation of each composition, such as the order of complexing agent and main salt, acid and water.

3 Maintenance and management of electroplating solution

Master the methods of maintaining the plating solution and removing impurities. The operation of the electroplating process is very complicated, and the content of each component of the electroplating solution is constantly changing during the production process. Therefore, strict management and maintenance of the electroplating solution is a key link to ensure a qualified coating. So, pay attention to the following points:

(1) Analyze the electroplating solution regularly, and make appropriate adjustments to the composition of the electroplating solution according to the analysis results.

Distilled water or deionized water should be used to dissolve and calculate the required amount of each component separately, and add it to the plating tank according to the order of preparation of the electroplating solution, and then filter, energize, analyze and adjust, and it will be normal after the test plating is qualified. use.

(2) The electroplating solution must be filtered regularly to remove harmful impurities.

(3) The amount of additives such as brighteners should be added by the method of Hall cell test or according to production consumption.

(4) In order to reduce the contamination of the electroplating solution due to excessive dissolution of the anode, an anode sleeve should be used during the electroplating process.

After electroplating, the anode plate must be taken out in time. When the anode passivation phenomenon occurs, the passivation film should be removed, and the anode passivation should be eliminated through the analysis and adjustment of the electroplating solution.