HARD COATING

Hardcoat anodizing exceeds wear characteristics of other hard coatings such as electroless nickel, hardchrome, and ceramic.

The hardcoat anodizing process produces superior hardness and denseness-when a part is hardcoated, it increases the micro finish 2-5 times, depending on the alloy.
Type III Hard Coat Offers

• Unmatched wear properties
• Coatings wear as well as or better than hardened steels (HRC values of 70) as judged by Suga and Taber Wear tests.
• Can achieve salt spray resistance in excess of 1000 hours.
• Can achieve very tight tolerances.
• High dielectric strength to 2000VDC.
• Heat dissipation.

Taber abrasion testing shows that hardcoat exceeds wear characteristics of other hard coatings such as electroless nickel, hardchrome, and ceramic.

Some industrial applications of Hardcoat anodizing include highly intricate parts such as pistons, anti-lock brake assemblies, pump components, valves, sliding parts, insulation plates and transmission parts. Some retail applications for Hardcoat anodizing and Sulfuric anodizing include cookware, bike rims, locks and levels.

The final appearance of a hardcoated surface depends on the alloy and thickness of the coating. The color of an undyed finish can range from gray to black and various shades of bronze can be produced.

Hard coat should not be sealed where the main function of the application is to obtain the maximum degree of abrasion or wear resistance. Where Hard coatings are used for exterior non-maintained applications requiring corrosion resistance but permitting reduced abrasion resistance, sealing is available. Our sealing capabilities include immersion in a medium, such as boiling deionized water, in a hot aqueous 5 percent sodium dichromate solution, in a hot aqueous solution containing nickel acetate.

Note: Hard Coat that does not require a seal should be thoroughly rinsed in cold, clean water and dried after anodizing.

Download Mil-A-8625