Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called anodizing because the part to be treated forms the anode electrode of an electrolytic cell. Anodizing increases resistance to corrosion and wear and provides better adhesion for paint primers and glues than bare metal does. Anodic films can also be used for several cosmetic effects, either with thick, porous coatings that can absorb dyes or with thin transparent coatings that add reflected light wave interference effects. Anodizing is also used to prevent galling of threaded components and to make dielectric films for electrolytic capacitors. Anodic films are most commonly applied to protect aluminum alloys.

We process:

CHROMIC ANODIZING (ANODIZE ACID TYPE I)

The oldest anodizing process uses chromic acid. It is widely known as the Bengough-Stuart process but, due to the safety regulations regarding air quality control, is not preferred by vendors when the additive material associated with type II doesn't break tolerances. In North America, it is known as Type I because it is so designated by the MIL-A-8625 standard, but it is also covered by AMS 2470 and MIL-A-8625 Type IB. In the UK it is normally specified as Def Stan 03/24 and used in areas that are prone to come into contact with propellants etc. There are also Boeing and Airbus standards. Chromic acid produces thinner, 0.5 μm to 18 μm (0.00002" to 0.0007") more opaque films that are softer, ductile, and to a degree self-healing. They are harder to dye and may be applied as a pretreatment before painting. The method of film formation is different from using sulfuric acid in that the voltage is ramped up through the process cycle.

STANDARD ANODIZING (SULFURIC ACID TYPE II)

The most common and cost-effective anodizing process. Provides excellent abrasion and corrosion resistance. Except for die castings, these coatings are easily dyed a wide range of colors.

HARD ANODIZING (TYPE III)

Hardness equal to hard chrome plating is easily attainable. These coatings accept black dyes well, while lighter colors are available on thinner coatings. Type III provides excellent wear resistance and heat dissipation. This coating has an outstanding ability to absorb a variety of lubricants and is, therefore, recommended where friction is a factor. 

Regular Colors

Military Tan, Fast Blue G, Copper BF, Teal, Brown BL, Yellow D, Golden Orange RLW, Violet MRB, Green AEN, Gold S, Fiery Red, Violet 3D, Custom Wine, Black HBL, Bordeaux RED, Grey BL, Neon Pink, Gray R, Turquoise PLW, Blue A, Black MLW, Olive Drab.

Optical Colors

Optical Black, Optical Bronze.