Alkaline Cyanide Free Zinc Plating

The alkaline cyanide free zinc plating process is an electroplating process that uses a cyanide free alkaline zinc salt solution as the plating solution to deposit a uniform and compact layer of zinc on the metal surface. This process is environmentally friendly because the cyanide used in the traditional cyanide containing zinc plating process is highly harmful to the environment and human health

 

Author: Marisa

 

The alkaline cyanide free zinc plating process is an electroplating process that uses a cyanide free alkaline zinc salt solution as the plating solution to deposit a uniform and compact layer of zinc on the metal surface. This process is environmentally friendly because the cyanide used in the traditional cyanide containing zinc plating process is highly harmful to the environment and human health.

 

The electroplating solution of alkaline cyanide free zinc plating process is generally composed of zinc salts, complexing agents, pH adjusters, brighteners, and other additives. The function of chelating agents is to stabilize zinc ions, enabling them to be effectively electroplated at low concentrations without precipitation.

 

Some key points during operation of this process include:

 

1. Control the composition of the electrolyte: It is necessary to control the proportion of zinc salts, complexing agents, and other additives to ensure good coating quality.

 

2. Maintain an appropriate pH value: The pH value of alkaline cyanide free galvanizing process is usually maintained at a high alkaline level, between 8-12. two hundred and eighteen

 

3. Control of current density: Excessive current density can lead to rough coating, while insufficient current density can result in slow plating rate and uneven coating.

 

4. Temperature control: The temperature of the plating solution is usually maintained between room temperature and 20-30 degrees Celsius, and an appropriate temperature can help improve the brightness and adhesion of the coating.

 

5. Stirring and filtering: During the electroplating process, it is necessary to continuously stir the plating solution to ensure the uniform distribution of zinc ions, and to filter out impurities in the tank solution to prevent coating defects.

 

6. Cleaning the workpiece: Before electroplating, the workpiece must be thoroughly cleaned to remove oil stains, oxides, and other surface pollutants, which is important for the quality of the coating.

Alkaline cyanide free galvanized coating has good corrosion resistance and decorative effect, and is often used in various fields such as mechanical components, hardware tools, building materials, and automotive parts.