Enhanced Corrosion Resistance with a Durable Black Finish

Metal Finishing Group provides Zinc Black Type II – SC 3 plating services, offering a superior level of corrosion protection combined with a uniform, deep black finish for steel and iron components. This process involves applying a sacrificial zinc coating followed by a black chromate conversion coating, specifically engineered to achieve the SC 3 level of supplementary treatment.

Zinc Black Type II – SC 3 is chosen when components require significantly enhanced corrosion resistance against both white corrosion (zinc oxidation) and red rust (iron oxidation) in more demanding environmental conditions. It is ideal for critical automotive parts, military equipment, and industrial applications where extended durability and a non-reflective black aesthetic are paramount. This robust coating provides reliable, long-lasting protection against aggressive environmental factors.

Our Zinc Black Type II – SC 3 Capabilities: Superior Protection and Aesthetics

We offer precise Zinc Black Type II – SC 3 plating services, 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.
  • Black Chromate Finish: Applies a rich, uniform black chromate conversion coating over the zinc, delivering a distinct aesthetic and enhanced corrosion performance.
  • Sacrificial Protection: The zinc layer actively corrodes before the base metal, safeguarding steel and iron components from rust.
  • Non-Reflective Appearance: The matte black finish is ideal for applications where glare reduction is desired, maintaining a professional look.
  • 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 Black Type II – SC 3:

Zinc Black Type II – SC 3 plating 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.
  • Distinct Black Finish: Offers a professional and aesthetically pleasing dark appearance.
  • Reduced Light Reflection: The matte black surface minimizes glare, beneficial for specific equipment and visual needs.
  • Enhanced Durability: The robust coating system significantly extends the service life of ferrous metals.
  • Cost-Effective High Performance: Delivers a reliable and economical solution for advanced corrosion requirements.

Applicable Specifications We Adhere To:

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

  • ASTM B633 (Type II, SC 3): This specification defines electrodeposited coatings of zinc on iron and steel. Type II refers to zinc with a black chromate conversion coating. 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 Black Type II – SC 3 Applications:

Zinc Black Type II – SC 3 plating 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.
  • Military and Defense: Applied to firearm components, hardware, and equipment for superior corrosion protection and glare reduction in field conditions.
  • Industrial Machinery: Protects machine components, tools, and brackets in environments with moderate to high humidity or chemical exposure.
  • Fasteners: Enhances corrosion resistance and provides a uniform black finish for bolts, nuts, and washers exposed to harsher conditions.
  • Outdoor Equipment: Used for components of agricultural machinery, garden tools, and other items exposed to weather.
  • Electronic Enclosures: Provides robust corrosion protection for housings in outdoor or challenging electronic applications.

Why Choose Metal Finishing Group for Zinc Black Type II – SC 3?

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