Sulfuric Acid Anodize

Definition: Sulfuric acid anodizing is a conversion on aluminum which changes the surface to an aluminum oxide film that can range from (.0001″) – (.001″) thick. This oxide coating gives the aluminum a greater resistance to abrasion, protects from corrosion, and provides excellent thermal and electrical insulation. The aluminum oxide builds up on the surface and penetrates into the material an equal amount. Sulfuric acid anodize films are naturally porous which makes them great for absorbing colored dyes which can be later sealed with a PTFE coating to further protect against abrasion and bleaching effects caused by sunlight.

Benefits

  • High Corrosion Resistance
  • Greater Abrasion Resistance
  • Non-Conductive
  • Cosmetic Appearance

Specs

  • Mil-A-8625F, Type II, Class 1 & 2
  • ASTM-B580-79 (reapproved 2014), Type B-F
  • AMS-2471H, undyed coating
  • AMS-2472G, dyed coating

Colors Offered

  • Natural (Clear)
  • Gray
  • Black
  • Blue
  • Red
  • Green
  • Gold
  • Yellow
  • Bronze
  • Copper
  • Military Green and Tan

Available Processes

  • Hand-line
  • Hoist-line

Notes: All of our anodize finishes are RoHS compliant. JMD can provide corrosion testing according to ASTM B117 per request. JMD can certify to any of the specifications mentioned above per request.

Hardcoat Anodize

Definition: While usually performed in a sulfuric acid based electrolyte, hardcoat anodize is much thicker and denser than the more conventional sulfuric anodize. Hardcoat is specified for aluminum components subject to extreme wear applications where superior abrasion resistance is needed, or corrosive environments where a thicker, harder, more durable coating is necessary. It can also be valuable where enhanced electrical insulation is required. Hard anodized coatings are typically at least .002″ thick where .001″ penetrates the metal and .001″ builds on the surface.

Benefits over regular anodize

  • Higher Corrosion Resistance
  • Greater Abrasion Resistance
  • Increased Hardness

Specs

  • Mil-A-8625F, Type III, Class 1 & 2
  • Mil-A-63756A, anodic coating with PTFE
  • ASTM-B580-79 (reapproved 2014), Type A
  • AMS-2469J, hard anodic coating
  • AMS-2482D, hard anodic coating with PTFE

Colors Offered

  • Natural (Clear)
  • Gray
  • Black

Available Processes

  • Hand-line
  • Hoist-line

Notes: By default, Hardcoat Anodize is an unsealed finish where the primary purpose is to gain maximum hardness and wear resistance. If corrosion resistance is also a factor, or you require the anodize to be dyed, a seal should be specified when ordering. All of our anodize finishes are RoHS compliant. JMD can provide corrosion testing according to ASTM B117 per request. JMD can certify to any of the specifications mentioned above per request.