Alkaline zinc barrel plating is one of the most reliable electroplating methods developed especially to protect small-volume, high-quantity parts against corrosion. Performed in cyanide-free alkaline electrolyte baths using a rotating barrel system, this process penetrates every point of complex geometries such as bolts, nuts, washers and clips. The most characteristic feature of the alkaline system, its high “throwing power,” provides an even and balanced coating thickness from the deepest recesses to the outermost edges of the part, delivering flawless results on technical components with critical tolerances.
From a sectoral perspective, this method has a wide range of applications where durability and mass production speed come together. In the automotive and white goods industries, it is considered a standard application for extending the service life of fasteners exposed to vibration and humid environments. It also increases the resistance of metal components that preserve structural integrity against environmental factors in the construction and electrical sectors. When combined with special passivation processes applied after plating, the parts gain both a decorative appearance and reach the highest limits in salt spray test resistance, providing long-term protection against rust.