Zinc plating is an electrolytic coating process that applies a layer of metallic zinc onto steel or iron parts, with the purpose of protecting them against oxidation and corrosion. This layer acts as a physical barrier and, at the same time, as cathodic protection, preventing the metal part from deteriorating when exposed to humid, chemical or industrial environments.
Types of Zinc Plating
- White Zinc Plating
Silver-coloured, clean and uniform finish with a technical appearance. It is the ideal option for those seeking resistance.
Typical applications: fasteners, screws, metal brackets, technical parts
- Blue Zinc Plating
Bright, uniform finish with a bluish tone. It is the most common option in the industry due to its aesthetic neutrality and good anticorrosion protection.
Typical applications: fasteners, screws, metal brackets, technical parts
- Black Zinc Plating
Dark finish, used when a discreet visual appearance or aesthetic integration with dark components is required. It offers the same functional protection as white zinc plating.
Typical applications: automotive parts, visible structures, tools, technical furniture
- Iridescent Zinc Plating
Also known as yellow zinc plating, this finish presents tones that range from gold to blue and green. It is frequently used by manufacturers who require visual differentiation and superior protection in more aggressive environments. It is the ideal finish for subsequent painting.
Typical applications: technical parts, automotive components, industrial machinery
Advantages of Zinc Plating
- Corrosion and rust resistance
- Low cost and excellent performance/price ratio
- Compatible with subsequent treatments (painting, assembly)
- Suitable for various types of parts and geometries
Frequently Asked Questions
Yes. Zinc plating can serve as a base for electrostatic or liquid painting, provided the surface is properly prepared to ensure adhesion between layers.