What are the factors that affect the galvanizing of metal stampings?
- The surface of metal stamping parts is not thoroughly cleaned, and a curing film is formed on the surface of stamping parts, which affects the normal deposition of electro-galvanizing.
2. Stamping parts have high carbon content. High carbon steel and cast iron will reduce the hydrogen evolution potential, accelerate the hydrogen evolution on the surface of the workpiece, and reduce the electroplating efficiency.
3. The stamping parts are bundled too tightly, and part of the surface is not plated in place during the galvanizing process.
4. The content of additives in the galvanizing bath is low. Low additive content will affect the dispersibility of zinc, and the coating will appear too thin in some parts.
5. Surface corrosion will also reduce the hydrogen evolution potential, accelerate the surface hydrogen evolution of stamping parts, reduce the current efficiency, and affect the deposition rate of zinc.
6. Low sodium hydroxide content. Low sodium hydroxide content reduces current density and anode passivation.
7. Anode passivation will reduce the effective area, thereby affecting the normal distribution of current.
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