Anodizing

Lehitech services

What is anodizing?

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized.

Anodizing's Service

Anodizing's Benefits

The unique anodized finish is the only one in the metals industry that satisfies each of the factors that must be considered when selecting a high performance aluminum finish:

Durability. Most anodized products have an extremely long life span and offer significant economic advantages through maintenance and operating savings. Anodizing is a reacted finish that is integrated with the underlying aluminum for total bonding and unmatched adhesion.

Color Stability. Exterior anodic coatings provide good stability to ultraviolet rays, do not chip or peel, and are easily repeatable.

Ease of Maintenance. Scars and wear from fabrication, handling, installation, frequent surface dirt cleaning andusage are virtually non-existent. Rinsing or mild soap and water cleaning usually will restore an anodized surface to its original appearance. Mild abrasive cleaners can be used for more difficult deposits.

Aesthetics. Anodizing offers a large increasing number of gloss and color alternatives and minimizes or eliminates color variations. Unlike other finishes, anodizing allows the aluminum to maintain its metallic appearance.

Cost. A lower initial finishing cost combines with lower maintenance costs for greater long-term value.

Health and Safety. Anodizing is a safe process that is not harmful to human health. An anodized finish is chemically stable, will not decompose; is non-toxic; and is heat-resistant to the melting point of aluminum (1,221 degrees F.)
zinc electrowinning workshop

Anodizing's Service

Anodizing's

Hard Coat Anodizing

Hard Coat Anodizing is similar to type II anodizing, but is produced while at a colder temperature to create a harder, smoother, thicker and more wear resistant surface.

Hard Coat With Teflon

Hard Coat with Teflon (HCWT) Teflon impregnated into unsealed anodic coating. Adds increased lubricity to hard coat anodized parts. CMP also teflons on type II anodizing.

Bulk Anodizing

This process is usually used in the screw and fastener industry and is an inexpensive although functional alternative to location and rack anodizing. Barrel anodizing / bulk anodizing is a cost-efficient alternative for certain customer’s running high annual usage.

Decorative Anodizing

Color and protect aluminum parts for aesthetic appeal. We can match most architectural colors, just send us a sample and we’ll help you out.

Color Anodizing

Our two-step electrolytic coloring system offers a deep and rich range of bronze coloring from champagne to light/medium and dark bronzes or black. These color options are ideal for architectural purposes and any application where color fading is not acceptable.

Anodizing Standard

MIL-A-8625 Type II, Class 1 & 2
ASTM B580

Process

Cleaning removes fabrication oils and buffing compounds by soaking the work in a water-based solution containing mild acids or alkalis along with dispersants and detergents.

 Pretreatment used for decorative purposes to improve the appearance of a surface prior to the anodizing step. The most common pretreatments are etch, which imparts a satin, matte finish; and bright dip, which impart a bright, shiny finish.

Anodizing produces the actual coating. Acting as the positive electrode, a direct current is passed through the item to be anodized while submerged in a bath of water and acid (sulfuric, chromic, phosphoric) used as the electrolyte. The range of colors can be expanded by over-dyeing the organic dyes, offering even more color versatility.

The water breaks down, liberating oxygen at the surface of the item, which then combines with the aluminum to form the coating a transparent and microscopically porous layer of aluminum oxide. Thickness is determined by the level of electrical current and the length of time it is applied.
Coloring – is an option approach.
Sealing the pores on the surface of the finished pieces need to be closed before the anodized item is placed into service. If left unsealed, surfaces could have poor corrosion resistance, or absorb unwanted stains. Items that are not colored during or after anodizing retain the natural color of the metal.

LehiTech will provide aluminum anodizing that yields durable, long-lasting coatings, with the beauty and luster of the natural metal shining through, while providing a lifetime of protection. Our experienced and highly trained specialists can help get your anodizing project off the ground, and into production. So give us a call today. The results we achieve will astound you!

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