Acid zinc coating is an electrolytic surface finishing process applied in a medium-acidic (pH 4.5–5.5) zinc chloride and ammonium chloride based bath, providing metal parts with both corrosion protection and a high-brightness, aesthetic finish. Thanks to the high throwing power characteristic of chloride-based zinc baths, a uniform coating thickness is achieved even on parts with complex geometries and deep recesses.

Çinkosan applies acid zinc coating via the barrel process, delivering a highly efficient, bright and consistent finish especially for small and medium-sized fasteners.

• Delivers excellent brightness and throwing power, producing a uniform, aesthetic finish even on complex-geometry parts.
• Provides very good metal distribution, resulting in balanced coating thickness across the part.
• Remains flexible even at higher coating thicknesses, reducing the risk of cracking.
• High cloud point (50°C) allows stable, trouble-free operation up to 40°C.
• Operates across a wide current density range (0.2–6.0 A/dm²), adapting to different part geometries.
• Compatible with passivation and lacquer applications, further enhancing corrosion resistance.
• Well suited to the barrel process, offering an economical and efficient solution for mass production.

• Fasteners (screws, nuts, bolts, washers)
• Automotive supply industry
• White goods components
• Small electrical and electronic parts
• General metal industry

Çinkosan continuously monitors critical bath parameters such as temperature, pH and current density to ensure a stable and repeatable coating quality. Regular laboratory analysis tracks bath composition, and every production batch is recorded to provide customers with a reliable surface coating solution.