Enhanced Corrosion Resistance with a Transparent Finish

Metal Finishing Group provides Zinc Clear Plating services to the SC 3 level of supplementary treatment, offering significantly enhanced corrosion protection with a clean, transparent finish for steel and iron components. This process applies a sacrificial zinc coating followed by a clear chromate conversion coating, specifically engineered to achieve a higher durability against environmental elements.

Zinc Clear Plating to SC 3 is chosen when components require superior resistance against white corrosion (zinc oxidation) and red rust (iron oxidation) in more demanding environmental conditions, while maintaining a natural metallic appearance. It is ideal for automotive fasteners, critical industrial hardware, and electronic components where extended durability and a discreet finish are crucial. This robust coating provides reliable, long-lasting protection against aggressive environmental factors.

Our Zinc Clear Plating – SC 3 Capabilities: Superior Protection and Clarity

We offer precise Zinc Clear Plating services to SC 3 specifications, ensuring a uniform and high-quality deposit for your critical components.

  • Elevated Corrosion Protection: Engineered to provide significantly higher corrosion resistance than SC 1 or SC 2 finishes, extending the lifespan of parts exposed to harsher conditions.
  • Clear Chromate Finish (Type I & III): We offer both Type I (hexavalent) and Type III (trivalent) clear chromate options. Both provide a transparent finish that preserves the zinc’s silvery-white appearance while enhancing corrosion resistance.
  • Sacrificial Protection: The zinc layer actively corrodes before the base metal, safeguarding steel and iron components from rust even under challenging conditions.
  • Good Electrical Conductivity: Maintains favorable electrical properties, suitable for many electrical components.
  • Rack and Barrel Plating: We accommodate both rack and barrel plating methods to suit various part sizes and production volumes.
  • Thickness Control: We achieve precise plating thicknesses to meet specific design and performance requirements.
  • In-house Quality Verification: We conduct rigorous salt spray testing to confirm compliance with SC 3 corrosion resistance requirements.

Properties of Zinc Clear Plating – SC 3:

Zinc Clear Plating to SC 3 imparts several key properties that enhance the performance and longevity of components:

  • Extended Corrosion Protection: Provides a substantial barrier against both white corrosion and red rust, capable of withstanding prolonged exposure in challenging environments.
  • Clean, Transparent Aesthetic: Offers a professional and appealing metallic appearance without adding color, preserving the component’s original look.
  • Cost-Effective High Performance: Delivers a reliable and economical solution for advanced corrosion requirements.
  • Reliable Electrical Conductivity: Maintains electrical continuity for functional components.
  • Excellent Paint Base: Can serve as an effective primer for subsequent organic coatings if a painted finish is required over enhanced corrosion protection.

Applicable Specifications We Adhere To:

Our Zinc Clear Plating – SC 3 processes consistently meet or exceed crucial industry standards, ensuring the quality and performance of your components. We regularly process to:

  • ASTM B633 (Type I & III, SC 3): This specification defines electrodeposited coatings of zinc on iron and steel. Type I refers to zinc with a hexavalent clear chromate, and Type III refers to zinc with a trivalent clear chromate. SC 3 designates a minimum corrosion resistance of 96 hours to white corrosion and 120 hours to red rust in a neutral salt spray test.
  • And various customer-specific requirements for enhanced corrosion protection.

Typical Zinc Clear Plating – SC 3 Applications:

Zinc Clear Plating to SC 3 is vital for numerous applications across various industries:

  • Automotive Industry: Used for fasteners, brake components, chassis parts, and critical under-hood components requiring enhanced corrosion resistance.
  • Industrial Hardware: Protects machine components, tools, and brackets in environments with moderate to high humidity or chemical exposure.
  • Fasteners: Enhances corrosion resistance and provides a uniform, natural metallic finish for bolts, nuts, and washers exposed to harsher conditions.
  • Electronic Components: Provides robust corrosion protection and conductivity for various electronic parts and enclosures that require a clear finish.
  • Construction: Used for components exposed to outdoor elements where appearance matters but color is not desired.

Why Choose Metal Finishing Group for Zinc Clear Plating – SC 3?

Metal Finishing Group is a trusted partner for high-quality Zinc Clear Plating to SC 3 specifications. Our commitment to precise application and rigorous quality control ensures a durable, highly corrosion-resistant, and aesthetically pleasing transparent finish for your steel and iron components. Partner with us for reliable metal finishing solutions that meet your demanding protection and performance requirements.