Hard Coat Anodizing

Very thin coatings similar to those produced by chromic anodizing are known as type iib.

Hard coat anodizing.

Provides solutions with certified quality unmatched delivery and competitive pricing. Providing quality hard coating and anodizing services to an array of industries since 1974. As a regional national and international aluminum parts anodizing leader hardcoat inc. Hardcoat anodize or simply hard anodize is a dense anodic coating of aluminum oxide applied by converting a properly cleaned and deoxidized aluminum alloy component into an oxide film using a suitable electrolyte typically sulfuric acid cooled to nearly freezing and applied voltages upwards of 100 volts at an applied current density of 24 36 amps per square foot.

As a result this style of anodizing is also referred to as type iii or hard coat. The only factor directly related to the hard coat anodizing process is coating thickness where imperfections in the substrate are grown and are thus dependent on coating thickness. Hard coat anodizing is a proven electrochemical process that transforms a plain metal surface into an engaging exterior that provides both advanced corrosion resistance and durability. The hard coat anodizing process has secondary factors such as chemical polishing steps and or surface etching.

Coatings of moderate thickness 1 8 μm to 25 μm 0 00007 to 0 001 are known as type ii in north america as named by mil a 8625 while coatings thicker than 25 μm 0 001 are known as type iii hard coat hard anodizing or engineered anodizing. Hard coat aluminum anodizing type iii to achieve greater corrosion protection for use in extreme environments or with moving mechanical parts the aluminum anodizing process can exceed depths 10 microns. The key difference between aluminum hard coating and standard anodization is that the process provides the surface with greater wear resistance and a smoother and harder finish. Hard coat anodizing further enhances these properties.