Anodizing

Test Methods For Evaluating Anodized Aluminum

Benefits of anodizing include durability, color stability, ease of maintenance, aesthetics, cost of initial finish and the fact that it is a safe and healthy process. Maximizing these benefits to produce a high–performance aluminum finish can be accomplished by incorporating test procedures in the manufacturing process.  

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Anodizing

Dichromate Sealing Problems

Question: We have carried out salt spray testing on 2024-T4 bare chromic acid anodized parts.

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Anodizing

What are the Properties of Black Anodized Finishes?

Quesiton: My company uses black anodized aluminum substrates in devices for biological cell maintenance systems.

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Anodizing

Cold Mill Banding Problem

Question: What is "cold mill banding" in 3003 aluminum sheet?

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Liquid Coating

Using Aluminum at Sea

Quesiton: My company deploys equipment housed in an enclosure that is located in a mild salt-spray environment but no sun/UV exposure.

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basics

What is Zinc Anodizing?

Question: I was asked the other day whether our shop could perform zinc anodizing.

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Anodizing

Dark Gray Spots in Clear Anodizing

Question: I am having a problem with surface imperfections in the anodizing on a new product of ours which we machine from 7075.  The imperfections look like small dark gray spots in the clear anodizing.  Under a microscope they look like corroded areas which have actually eaten away the machine marks in spots.  Any advice would be greatly appreciated.

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Anodizing

Checking Quality of Seal

Question:  We manufacture parts that have a Type II anodic coating that is 0.4–0.6 mil in thickness.

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Anodizing

Teflon Impregnated Anodizing

Question: From what I have read, Teflon® impregnated anodizing does not really have Teflon impregnated in the coating, but it is actually only adhered on the aluminum oxide surface.

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Parts Cleaning

Pitting After Anodizing

Question: We have a customer who is continuously sending us parts made from 7075-T6 that are pitted when we receive them.

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