Product Information (Chemical Coating)1 / 3

Chemical Coating/Chemical Conversion Coating
IRIDITE14-2
Alodine 1200, 1000
Chemical Conversion Coatings

Chemical conversion coatings, also called chemical coatings, are protective coatings formed onaluminum surfaces by utilizing chemical reactions.
Chemical conversion coatings have been generally used for the purposes of providing corrosion
resistance properties for aluminum and improving paint adhesion on aluminum.

Chemical conversion coatings can be produced with a variety of treatments. The most reliablechemical conversion coating is chromate coating produced by the reaction between the aluminum
surface and the treatment solution.

Structural drawing of chromate coating*Chromium is indicated as Cr (III) in thefigure, but Cr (VI) is also present.

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アルミニウム基材

Aluminum substrate

The hexavalent chromium chromate coating has high corrosion resistance and self-healing properties.
At the Riken Alumite Industry, we use either Iridite 14-2 or Alodine 1200 as a colored chromate
treatment agent, and Alodine 1000 as a colorless chromate treatment agent. Chemical conversion
coatings produced at our company comply with various standards including the U.S. Department of
Defense standard MIL-DTL-5541F Type I (MIL-C-5541) Class 1A/Class 3. (Note: Type I covers
coatings treated with the conventional and approved treatment agents and Type II covers coatings
treated with Cr (VI)-free treatment agents.)

Iridite 14-2: Manufactured by MacDermid, listed on the QPD-81706 (complying with the MIL-DTL-

Riken Alumite Industry Co., LTD.

Product Information (Chemical Coating)2 / 381706 Type I Class 1A/3)

Alodine: Manufactured by Nihon Parkerizing Co., Ltd. (licensed by Henkel), listed on the Ministry ofDefense QPL-81706

The size of the treatment tank permanently installed at our facility is 1000×2200×1500 (for Iridite 142 and Alodine 1000), but we will also consider the possibility of processing large products if required.
(We also accept a product with a volume larger than that of the treatment tank. For ring-shaped
products, we have successfully processed products with up to around φ2600 with our permanentequipment.)

We also have a large-scale processing line for Alodine 1000 and 1200. Maximum processable size is
900×1100×7000mm.

Features◎Color: Colored chromate coating provides a beautiful appearance with a light yellow or yellowbrown color. Meanwhile, colorless chromate coating allows the texture of the metal surface ofaluminum to be utilized as it is.
◎Corrosion resistance: With excellent corrosion resistance properties, chemical conversion coatings
are applicable as an anti-rust coating.
◎Paint adhesion: With excellent adhesion between the paint and the chemical conversion coating,chemical conversion coatings are used as an undercoating for painting.
◎Electrical conductivity: With an extremely small electrical resistance, chemical conversion coatings
are applicable to electrical and electronic components that require electrical conductivity. With
particularly low contact resistance, Alodine 1000 proves useful in the case where electricalconductivity is required.
◎Treatability: Chemical conversion coating is also applicable to products with complex shapes andeasily deformable products.

Touch-up treatment using brush painting technique and partial treatment are also available.

Standard performance and quality assurance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Riken Alumite Industry Co., LTD.

Product Information (Chemical Coating)3 / 3◎Compliant with the MIL-DTL-5541 Type I (MIL-C-5541) Class 1A standard: Colored chromate
coating where the primary coating performance requirement is corrosion resistance and where thecoating is used as an undercoating for painting; Two types of treatment agents are available which are
Iridite 14-2 and Alodine 1200.

Corrosion resistance

Salt spray test for 168 hours (2024-T3)◎Compliant with the MIL-DTL-5541 Type I (MIL-C-5541) Class 3 standard: Corrosion resistantcoating where electric conductivity is required. Colored or colorless chromate coating: Iridite 14-2 isavailable as a colored chromate treatment agent and Alodine 1000 as a colorless chromate treatment
agent.

Corrosion resistance:Salt spray test for 168 hours (6061-T6)

Contact resistance: 5000μΩ or less in the test specified in the MIL-DTL-81706 standard (10000μΩ orless after salt spray test)

Precautions for Use - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ◎The coating is soft and thin, which proves ineffective in protecting products from scratches, etc. Do
not apply the coating to sliding parts.
◎When used without painting, the corrosion resistance may reduce when the coating is subjected toheat of 60°C or higher. During baking finishing, cover any unpainted surface of the coating.
◎Chemical conversion coatings contain Cr (VI). However, products treated with chemical conversion
coating do not conflict with the regulations on chemical substances contained in products, with theexception of the products having large surface with respect to the product weight, such as thin plates
and small screws. However, the matter mentioned above is not applied to the products subject toregulation of substances prohibited from in-process use.

Riken Alumite Industry Co., LTD.