There are several essential factors that need to be considered during zinc plating. These factors have a direct impact on the overall quality of the zinc electroplating, which in turn determines the corrosion resistance and the surface protection the plating provides in the short and long term.
Top companies offering zinc plating have perfected their techniques in the process. The most common type of zinc plating uses a non-cyanide plating method, which means a more environmentally safe plating method. With improvements in this technology, it offers bright, durable, and uniform plating that can be controlled to the specific tolerances required by the OEM.
The best metal finishing companies take great care in setting up the zinc electroplating method used for a given part or component. Each aspect of the process contributes to the overall finish and should be customized to the specific part.
Current Density Factors
With the precision type of plating required today, the density of the current used in the process is critical. Typically, the higher the current density, the thicker the zinc plating developed on the surface.
It is important to keep in mind that thicker is not better. If the zinc layer is too thick, the surface appearance of the plating will be uneven, and it can even take on a wrinkle-like appearance.
Concentration of Plating Solution
The formulation and the concentration of zinc in the plating bath has a direct impact on the final result. The lower concentrations of zinc in the bath are ideal for creating an even surface with a bright finish and a fine crystal structure. The heavier concentrations of zinc in the bath result in larger crystals and a more textured surface.
The temperature of the bath, the use of specific types of brighteners and surfactants as well as the time the components are in the bath are also essential variables to consider.