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Anodizing 201R5

Our anodizer is using the following specification 201R5 for our aluminum components. Does anyone know what this specification means.

Ray Carter
- Shokan New York USA
2000

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First of three simultaneous responses--

201R5 is an Alcoa designation for a .0002" thick anodize with a brite dip pretreatment.

Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.

Wadsworth, Ohio

2000

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Second of three simultaneous responses--

Its basically a specified designation for the type of finish you are getting. The 201R5 and other coatings from the Aluminum Association (dear god I hope I have that right, its very late :-)) have designations similar to this such as 202R1 and so on and so forth. Basically it would amount to something such as this :

201R5 = Standard Sulfuric Anodize 2.5 micron (or .0001 thickness). Thats the 201 part, the R5 stands for highly specular finish is what the chart from anodizing.org states. Check it out under the reference guides section. That'll give you a little more insight into this.

Matthew Stiltner
plating shop - Toledo, Ohio
2000

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Third of three simultaneous responses-- 2000

The spec you reference is from Alum. Assoc. I do not have 205 R1 but here are the ones I do have.

ALUMINUM ASSOCIATION ANODIC SPECS FOR ALUMINUM

• 202R1  20 MINUTE (OR EQUIVALENT) ANODIZE
• 204R1   30 MINUTE (OR EQUIVALENT) ANODIZE
• 215R1   60 MINUTE (OR EQUIVALENT) ANODIZE
• 225R1   HARDCOAT: .001 +- .0005
• 226R1   HARDCOAT . 002 +- .0005
• 300R1   DURANODIC: COLOR TO BE SPECIFIED

David A. Kraft
- Long Island City, New York

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Is there an industry or military standard for bright dip? Something to call out in a print, i.e. "Chemical etch per _________."

Peter Hall
- Ellicott City, Maryland, USA
November 8, 2012