Anodizing

Exploring the: Anodizing Zone

193 Results for: Experts

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Published: 2/18/2011

Anodized and Dyed Black Extrusions Turning Green and Purple
We notice that the black extrusions have a greenish cast to them when we receive them from the anodizer. When the parts are exposed to plant lighting and to indirect sunlight, they turn a purplish color after six months or less.

Published: 1/11/2011

Producing a Thick Anodic Coating on 6061-T6
Our customer has requested .004-inch (100µ, 4 mil) coating thickness on 6061-T6. We normally anodize this part to .002-inch thickness. Our process is 28 V, bath temperature 32°F, for 1 hr. We are not sure of exactly what the best procedure is to har...

Published: 1/11/2011

"Snowflake" Corrosion on Anodized Aluminum Parts
One of our customers sends their extrusions to an outside anodizer near their plant. They sent us some samples of their anodized parts that were exhibiting a condition that looked like small snowflakes all over the part.

Published: 8/1/2010

Black Power on Die Casting After Anodizing
After anodizing there is a loose, black powder that can be removed just by touch. Can you tell me why this happens and recommend a method to prevent it?

Published: 8/1/2010

ASTM Test Comparison
What is the difference between ASTM B136-84 and B-136-77 for the Modified Dye Stain Test?

Published: 8/1/2010

Dying Anodized Parts With Small Holes
We send our 6061 aluminum bars to an outside anodizer for Type II anodize and black dye. These parts have several very small diameter, blind holes, both threaded and non-threaded. When we get these parts back from the anodizer, the tapped holes will...

Published: 5/1/2010

What is the Correct Anodizing Specification?
My company fabricates aluminum and steel pedestrian bridge railing among other bridge parts. We recently got an aluminum railing job that called for “Type I” anodizing per MIL-A-8625. There was no anodic coating thickness called out. We are not anod...

Published: 2/1/2010

Teflon Impregnation and Wear
Does Teflon-impregnated aluminum offer a higher resistance to wear or corrosion?

Published: 2/1/2010

Dichromate Sealing and Fatigue Life
We are looking for some references that show that dichromate sealing restores the loss in fatigue life caused by hard anodizing aluminum alloys.

Published: 2/1/2010

The Problem of Sealing Smut
Is there an anodizing cleanliness standard that is reasonable for our suppliers to meet? Is there an ISO, ASTM, IPC, Nadac or any other standard?