H&W Global offers sulfuric acid anodizing of aluminum with a variety of options for sealing the finished metal surface, including nickle acetate, sodium dichromate, and hot water.

Most industrial anodizing is performed on aluminum and its alloys, but H&W Global can also anodize titanium and magnesium.

The anodizing process brings value to aluminum parts by creating a uniform aluminum oxide layer. This is the hardest of all surface finishes. Anodized aluminum is corrosion resistant, plus anodizing yields an outer surface to which paint and other organic finishes can adhere.

Anodizing is excellent for both indoor and outdoor applications. The anodized coating may be decorative, as in soft coat anodizing, or it may be applied to add mechanical strength, as in hard coat anodizing. H&W Global offers both processes with many custom options.

H&W offers clients almost unlimited choices in the color as well as the finish of their anodized pieces. If no coloring is desired, the anodized coating may simply be sealed, in which case it will appear silver. This is often referred to as “clear anodizing.”


Soft Coat Anodizing

H&W Global offers soft-coat anodizing that is commonly used for decorative purposes and can apply a bright color coat to most aluminum alloys.

The soft-coat anodizing (MIL-A-8625 Type II) process takes place at 72 degrees F in a sulfuric acid solution. The coating thicknesses achieved through this anodizing process ranges from 0.2 mils to 0.7 mils for interior coatings, and 0.8 mils to 2.0 mils for exterior coatings. The direct current (DC) power needed may range from 12 to 18 amps per square foot (ASF).

As with everything we do at H&W Global, this coating process undergoes proven process-control inspections allowing us to deliver the highest levels of quality and consistency.

Hard Coat Anodizing

H&W Global offers a hard-coat anodizing service that is most commonly applied for mechanical strength, and to give an abrasive resistant coating. The hard-coat procedure (MIL-A-8625 Type III) has the same tank setup as soft-coat, but is run at a much colder temperature of 32 degrees F. This is because the direct current (DC) power that is applied during hard-coating is significantly higher at 30 to 40 amps per square foot (ASF), and generates more heat than soft-coat anodizing. In general, these coatings range from 1.0 mils to 2.5 mils.

Careful consideration should be given when using the hard-coat anodizing process on highly-stressed parts, because of their marked lowering of fatigue performance, as well as on parts with sharp corners and edges where chipping is more likely to occur.

H&W’s anodizing services include the following steps:  racking, cleaning, etching, deoxidizing (desmutting), anodizing, dying, sealing, unracking, rinsing and packaging. Each can be customized for specific metals and desired coating types.

Request A Quote

H&W’s industrial hard-coat and soft-coat aluminum anodizing services meet or exceed stringent military standards, including:

MIL-A-8625F Type II (soft coat), Class 1 & Class 2
MIL-A-8625F Type III (hard coat), Class 1 & Class 2
LM Aero – Codes 200B, 200C, 200L
Bulk Anodizing also available for Type II & III

Ask H&W Global
about Anodizing:

What metals are recommended for anodized finish?

Anodizing is most often performed on aluminum and aluminum alloys, but can also be applied to magnesium, titanium, and other metals.

How may we help you?

Custom Masking
Custom Graphics
Laser Engraving
Threaded Inserts
Assembly, Kitting
Custom Packaging
Go to Top