Versatile Protection for Aluminum Components

Metal Finishing Group provides Chemical Film, also known as Chem Film or Chromate Conversion Coating, for aluminum components. This process creates a thin, gel-like chromate layer on the aluminum surface. It offers excellent corrosion resistance, superior adhesion for subsequent coatings, and maintains electrical conductivity, making it a highly versatile treatment for aluminum.

Chem Film is chosen when aluminum parts require enhanced corrosion protection or an ideal primer for paint, powder coating, or adhesive bonding. It is also invaluable for applications where the electrical conductivity of the aluminum must be preserved. We offer both clear and yellow chemical film finishes, allowing for aesthetic preference or specific application requirements.

Our Chemical Film Capabilities: Clear and Yellow Options

We offer precise Chemical Film application, providing both clear and yellow chromate conversion coatings to meet your specific needs.

  • Corrosion Protection: Both clear and yellow films significantly enhance the corrosion resistance of aluminum.
  • Superior Adhesion: The treated surface creates an excellent base for paint, powder coating, and adhesive bonding, promoting strong and lasting adhesion.
  • Electrical Conductivity: Unlike anodizing, chemical film preserves the electrical conductivity of the aluminum substrate.
  • Clear Finish (Type II / Class 3): Provides a transparent finish that retains the natural metallic appearance of the aluminum, ideal when minimal visual alteration is desired.
  • Yellow Finish (Type I / Class 1A): Offers a distinct iridescent yellow to gold appearance, often used  for maximum corrosion resistance or for visual identification.
  • Low Operating Temperatures: The application process occurs at lower temperatures, minimizing any risk of distortion to sensitive parts.
  • Minimal Dimensional Change: The film is extremely thin, ensuring no impact on part dimensions.
  • Rack and Barrel Processing: We accommodate both rack and barrel processing for various part sizes and production volumes.
  • In-house Quality Verification: We conduct in-house salt spray testing to confirm corrosion resistance.

Properties of Chemical Film:

Chemical film imparts several key properties that enhance the performance and utility of aluminum components:

  • Excellent Corrosion Resistance: The chromate layer acts as a barrier, protecting the aluminum from environmental attack. Yellow chromate generally offers superior corrosion resistance compared to clear.
  • Paint Base: Provides an ideal base layer for subsequent painting, ensuring strong and long-lasting adhesion.
  • Adhesive Bonding: Greatly improves the bond strength for adhesive applications.
  • Electrical Conductivity: Maintains the aluminum’s natural electrical conductivity, making it suitable for electrical components.
  • Lightweight Protection: Adds minimal weight to parts due to its thin film thickness.

Applicable Specifications We Adhere To:

Our Chemical Film processes consistently meet or exceed crucial industry standards, ensuring the quality and performance of your components. We regularly process to:

  • MIL-DTL-5541 Type I (Yellow/Gold, Class 1A)
  • MIL-DTL-5541 Type II (Clear/Non-Chromium, Class 3)
  • AMS 2473 (Yellow/Gold)
  • AMS 2474 (Clear)
  • ASTM B449
  • And various customer-specific requirements.

Typical Chemical Film Applications:

Chemical film is widely applied across numerous industries for its functional and protective benefits on aluminum:

  • Aerospace: Used for structural components, housings, and fasteners requiring corrosion protection and a paint base.
  • Electronics: Applied to chassis, heat sinks, and connectors where electrical conductivity must be maintained.
  • Automotive: Protects aluminum engine parts, brackets, and trim.
  • Military and Defense: Ensures corrosion resistance and serves as a paint base for various aluminum equipment.
  • Consumer Goods: Provides aesthetic appeal and protection for aluminum enclosures and decorative elements.
  • Architectural: Used for aluminum panels and fixtures to enhance durability and prepare for finishing.

Why Choose Metal Finishing Group for Chemical Film?

Metal Finishing Group is a trusted partner for Chemical Film applications on aluminum. Our expertise in applying both clear and yellow chromate conversion coatings ensures a high-quality, durable finish that enhances corrosion resistance, improves adhesion, and maintains electrical conductivity. Partner with us for reliable metal finishing solutions that meet your precise needs for aluminum components.