Aluminum Hardcoating

Dav-Tech Plating's hardcoating process is designed to ensure the control of even the most critical dimensional specifications required for your high-performance applications.        

Email, call 508-485-8472 or request a quote on Aluminum Hardcoating today!

Aluminum hardcoating defined

Hardcoating, also called hard anodizing, involves converting an aluminum surface into aluminum oxide using a sulfuric  acid electrolyte. The process involves both penetration and build up on all affected surfaces.

The process is similar to sulfuric acid anodizing, though hardcoating baths typically run at lower temperatures, higher amperages and higher voltages.

Dav-Tech Hardcoat Anodizing Properties

Thickness .002” to .004”
Penetration 50%
Buildup 50%
War Resistance Excellent

Can be processed to meet specific requirements.

Corrosion Resistance Excellent

Can be processed to meet specific requirements.

Available finishes
  • Natural color
  • Black
  • Colors
  • Teflon® Impregnated
Reference Specifications Meets or exceeds all requirements of:
  • MIL-A-8625
  • Type III
  • Other military and commercial specifications
  • ELV
  • RoHS
  • WEEE

Benefits of Dav-Tech Hardcoat Anodizing

Dav-Tech Plating's hardcoat anodizing, when properly applied, can enhance the ability of a light metal (aluminum) to withstand heavy wear application as well as severe corrosive environments.

Other benefits of Dav-Tech Hardcoat include: 

  • Abrasion, corrosion and erosion resistance
  • Low coefficient of friction
  • Flame resistance
  • Dielectric properties
  • Excellent heat emissivity
  • Safe for food stuffs (cookware)
  • Non-contaminating to blood supplies (medical instrumentation)
  • Ceramic-like
  • Lightweight
  • Applicable to most aluminum alloys

Planning for Dav-Tech Hardcoating

The total thickness of the anodic coating produced during hardcoating is 50% penetration and 50% buildup. This penetration feature renders the coating integral with the substrate and differentiates it from other electrolytic coatings.

It also requires planning of critical dimensions on parts that need to be hardcoated.

Example: A 1.000” diameter shaft hardcoated .002” will increase to 1.002" as a final diameter, representing a .001" buildup per side. Similarly, a 1.000" bore will decrease to .998".

The typical hardcoating thickness of .002” to .004” can be controlled to close tolerances and can be finished by precise abrasive methods to meet extremely fine dimensional requirements.


Download our Hardcoat Datasheet

Learn about our Other Finishes



Hard Anodized Aluminum | Aluminum Anodize | Aluminum Anodizing | Hardcoat Anodize | Hardcoat Anodizing | Colored Anodizing

Dav-Tech Plating, inc.
PO Box 836, 40 Cedar Hill Rd., Marlborough, MA 01752
Phone: (508) 485-8472 • Fax: (508) 481-2364 • Email:
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