Zinc is a commonly used coating or plating for fasteners that offers excellent rust and corrosion resistance at a low cost. Like cadmium, zinc protects the substrate by providing a thin, protective barrier. The zinc is preferentially corroded when the coating is damaged or if the substrate is exposed to the environment from scratches or punctures. In this case, the zinc coating will always tarnish and corrode first while serving as a sacrificial coating to material it is protecting, such as steel.
Because zinc is a widely available material, one of the main benefits of zinc coated fasteners, including zinc-plated bolts, fasteners, and nuts, is that it is a cost-effective option. Compared to stainless steel fasteners, their zinc coated counterparts offer an acceptable level of strength and corrosion resistance for non-specialty applications at a cheaper price. In most cases, the level of corrosion resistance of is directly related to the thickness of the coating layer. Finally, zinc is a much more environmentally friendly option than cadmium.
Zinc coated fasteners, including zinc-plated bolts, screws, and nuts, are ideal for a wide range of industrial and outdoor applications. Zinc plating is typically used for screws and other small fasteners that will be exposed to corrosive conditions. Fasteners that have been zinc plated have a shiny, silvery or golden appearance, referred to as clear or yellow zinc respectively.
Zinc coated fasteners offer the following benefits and advantages:
Serves as a sacrificial coating for enhanced corrosion protection
Provides a protective barrier against moisture
Improved durability that increases the lifespan of the underlying metal
Bright decorative finish with various surface appearances
Environmentally friendly plating or coating option
Flexible and ductile, which makes it able to contour to the shape of the substrate
Easy application with low-stress deposit that will not damage the substrate
Excellent adhesive properties and serves as an effective undercoat
Capable of being applied uniformly and evenly in large batches
Polykart offers custom Zinc Coating
Polykart offers specialty coating to enhance the performance properties of our high-quality fasteners. For example, we offer in-house zinc plating services to enhance the corrosion, oxidation, and moisture resistance to our high-quality fastener products. The remarkable effectiveness of zinc coating combined with its cost-effectiveness makes it a popular coating choice.
Applications of Zinc Coating
Meeting high industry standards, our cadmium-plated fasteners are used in a wide variety of industries, including: Automotive