In acid zinc plating process, the concentration of zinc ions is an important factor affecting the quality of the coating, which directly affects the adhesion, crystal structure, gloss and corrosion resistance of the coating. The following are several possible effects of zinc ion concentration on coating quality:
1. Uniformity and thickness of coating:
Too low zinc ion concentration will lead to uneven coating, limited plating speed, it is difficult to form a uniform thickness coating on the entire surface of the plated workpiece.
Excessive concentration of zinc ions may lead to excessive deposition of the coating, roughness, dendrite or sintering and other undesirable phenomena.
2. Gloss of coating:
In acid zinc plating process, appropriate zinc ion concentration is helpful to obtain a better gloss, but too high or too low concentration will affect the appearance of the coating.
3. Porosity of coating:
In a certain concentration range, zinc ions help to reduce porosity and improve the density and corrosion resistance of the coating. Excessive concentration of zinc ions may increase the porosity of the coating due to irregular growth and weaken the protective properties of the coating.
4. Crystal structure:
The concentration of zinc ions will affect the crystalline structure of the coating, which will affect its mechanical properties and wear resistance. The unsuitable concentration of zinc ions may lead to larger grains and affect the overall properties of the coating.
5. Corrosion resistance:
The corrosion resistance of the coating is directly affected by the concentration of zinc ion, and the appropriate concentration can maintain good corrosion resistance.
Too low or too high concentration will reduce the protective effect and durability of the coating.
6. Internal stress:
In acid zinc plating process, improper concentration of zinc ions can lead to increased internal stress of the coating, which may cause cracking or stripping of the coating.
7. Adhesion of coating:
The incompatibility of zinc ion concentration will affect the bonding strength between the coating and the substrate, which may lead to insufficient adhesion of the coating.
In order to get a good coating, when we use Bigely acid zinc plating brightener, we need to carefully control the concentration of zinc ions to keep it within the appropriate operating range recommended by Bigely technical engineers. The selection of plating process parameters depends on coating requirements and application, and is usually determined through laboratory testing and production practice.
If you are interested in acid zinc plating brightener, please feel free to contact us.
