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:
- Greater Abrasion Resistance (best when unsealed)
- Higher Corrosion Resistance (best when sealed)
- Increased Hardness
Note: 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.
Mil-A-8625F, Type III, Class 1 & 2
ASTM-B580-79 (reapproved 2014), Type A
AMS-2469J, hard anodic coating
AMS-2482D, hard anodic coating with PTFE
Natural (Clear), Gray, Black
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.