Anodizing

Exploring the: Anodizing Zone

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Published: 4/30/2012

Ink Printing on Anodized Aluminum
We anodize small sheets and then digitally print on them. The time between anodizing and printing can be weeks. After 2–3 weeks, the anodic layer does not seem to absorb the solvent dye as well as it does after 1 or 2 days. How can we prolong the ti...

Published: 2/1/2012

Hardcoat Anodize Thickness Problem
During the anodizing cycle, how can we check to see if the coating thickness is reaching the thickness requirement stated on the drawing?

Published: 2/1/2012

Is it Anodized or Not?
What would be the best way to indicate whether or not an aluminum part has been electro-polished and anodized?

Published: 2/1/2012

Technical References for Anodizing
Are there any resources to read and keep on hand as references for troubleshooting appearance issues?

Published: 10/25/2011

Blistering of Anodic Coating on 7075 Alloy
We are facing a blister problem on 7075 alloy inside the bore diameter of our cylinder base. We noticed that this problem is occurring during dyeing process and not after hard anodizing.

Published: 5/1/2011

Chromic Acid Anodize Failing Salt Spray Testing
We are performing salt spray testing on 2024 and 7075 alloy test panels that have been Type I (Chromic Acid) anodized. The test panels have been sealed in DI water at 96°C (205°F) for 25 min. The panels fail the salt spray test within 24 hr.

Published: 5/1/2011

When Black Dye is Not Black
We are sending aluminum extrusions to our outside anodizer for Type II anodize and black dye, and we are encountering several problems, notably that the newly black anodized parts exhibit a greenish tint.

Published: 3/31/2011

Painting Anodized Aluminum
Can you tell me the pros and cons of painting anodized aluminum?

Published: 2/18/2011

Salts Build-up Around The Top of The Cathodes
The aluminum cathode bars in our Type II anodizing tank have become completely encrusted with white “salts” at the solution/air interface.

Published: 2/18/2011

“Cracking” of the Anodic Coating Under High Temperatures
After anodizing, the parts are annealed at 100°C. Most of the time they will withstand this process without damage, but sometimes the anodic coating cracks. I would like to ensure that they never crack at 100°C.