Anodized Finish

Anodized aluminum surfaces are harder than aluminum but have low to moderate wear resistance that can be improved with increasing thickness or by applying suitable sealing substances following the anodize process. The Anodic film produced is generally much stronger and more adherent than most types of paint and metal plating, but also more brittle. This makes anodic films less likely to crack and peel from aging and wear, but more susceptible to cracking from thermal stress.

anodize - Anodized Finish

Anodizing (also spelled “anodising”) is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.

anodize1 - Anodized Finish

The process is called “anodizing” because the part to be treated forms the anode electrode of an electrical circuit. Anodizing increases corrosion resistance and wear resistance, and provides better adhesion for paint primers and glues than bare metal. Anodic films can also be used for a number of cosmetic effects, either with thick porous coatings that can absorb dyes or with thin transparent coatings that add interference effects to reflected light

anodize2 - Anodized Finish

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, although processes also exist for titanium, zinc, magnesium, niobium, zirconium, hafnium, and tantalum.

anodize3 - Anodized Finish

Anodization changes the microscopic texture of the surface and changes the crystal structure of the metal near the surface. Thick coatings are normally porous, so a sealing process is often needed to achieve corrosion resistance.

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