Type II & Type III
Sulfuric Anodizing
Tell Me More

Type II &  Type III

We offer both Type II and Type III processes to meet your anodizing needs. What sets these two processes apart?

Aluminum colored anodizing Large Tank Capacity
Type II anodizing color options

Type II at a Glance

• Class I clear offered
• Class II colors available
• 0.0005"-0.001" tolerance
• Anodize solution between 68° - 75°

Type III anodizing

Type III at a Glance

• aka Hard Coat Anodizing
• Class I natural offered
• Class II black offered
• 0.001" - 0.002" tolerance
• Anodize Solution below 48°

Type II
Class 1 & Class 2

Tyoe II Class 1 anodizing

Class 1

Type II class 1 is a non-dyed anodizing process. This process usually has a thinner coating with a tolerance ranging from 0.0002"-0.0005".

Type II Class 2 anodizing

Class 2

Type II class 2 is a dyed anodizing process in which you can obtain a large variety of colors. This process has a thicker coating than Type II class 1, with a tolerance ranging from 0.0005"-0.001".

Type III
Class 1 & Class 2

Type III anodizing is also known as hard coat anodizing. Hard Coat anodizing is used in applications where the material needs to be corrosion, abrasion, and wear-resistant.

Type III Class 1 anodizing

Class 1

Type III class 1 is a non-dyed anodizing process. This process has a coating tolerance ranging from 0.001"-0.002".

Type III Class 2 anodizing

Class 2

Type III class 2 is a dyed anodizing process in which black is used. This process has a coating tolerance ranging from 0.001"-0.002".

Color Options

We offer a variety of color options as well as the ability to color match. Don't see the color you are looking for contact us today!

gold anodizing

Gold

• Type II Class II
•0.0006"+ tolerance
• up to 48" parts

red anodizing

Red

• Type II Class II
• 0.001"+ tolerance
• up to 48" parts

blue anodizing

Blue

• Type II Class II
• 0.0008"+ tolerance
• up to 48" parts

black anodizing

Black

• Type II Class II
•.0006"+ tolerance
• Up to 28' parts
•Also offered in Type III Class II with required range

Projects

We've helped companies just like yours with their Sulfuric Anodizing needs.

Color Anodize

Type II Class 2

Dyed Standard Anodizing

Type II Class 2 color anodizing

Type III Class 2

Black Hardcoat Anodizing

Type III Class 2 anodized parts

See More

View other projects we've worked on

The Anodizing Process

We take pride with what we do. That's why we take care when anodizing your parts.

  • degreasing

    Step 1

    Degreasing

    Base metals are washed with a commercial soap to clean away oils and other surface debris.

  • cold rinse

    Step 2

    Cold Rinse

    Base metal is submerged in a cold rinse tank where commercial soap and surface debris are washed away.

  • caustic wash

    Step 3

    Caustic Soda Wash

    Base metal is submerged in a sodium hydroxide based etch that takes away surface imperfections, scratches, minor scuffs, etc.

  • warm rinse

    Step 4

    Rinse

    Base metal goes through a cold and warm rinse to remove sodium hydroxide based etch chemicals.

  • deoxidizer

    Step 5

    Deoxidizer

    Deoxidizer is used to remove any film left from the etching process, leaving the metal brighter.

  • cold rinse 2

    Step 6

    Cold Rinse

    A cold rinse is used to remove leftover deoxidizer from the base metal to prepare it for the anodizing process. This is the final step in the cleaning process.

  • Anodize

    Step 7

    Anodize

    A controlled natural oxidation process using a sulfuric acid bath.

  • warm rinse 2

    Step 8

    Rinse

    A three-step rinse process to clean and clear the sulfuric acid and remaining surface oxidation away.

  • color dye

    Step 9

    Color

    Dye is added to a liquid bath where the anodized metal is then submerged to allow the dye to be absorbed. If clear, Skip to step 11.

  • cold rinse 3

    Step 10

    Color Rinse

    Freshly dyed metal is rinsed to remove unabsorbed dye.

  • clear or color seal

    Step 11

    Clear Seal & Color Seal

    A sealant is applied to the anodized material to help corrosion resistance and dye retention.

  • 2-step rinse

    Step 12

    2-Step Rinse

    A normal rinse is then followed by a heated rinse in the final step of the anodizing process.

  • NIA groundbreaking

    Anodize Complete

Contact Us

Our team is here to answer all of your anodizing questions!