Anodizing

Exploring the: Anodizing Zone

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Published: 11/1/2008

Problems with Black-Dyed Parts
Recently, we’ve had rejected parts because the black dye is coming off when the parts are wiped down with DI water.

Published: 11/1/2008

More on Type I vs. Type II Anodizing
In a question I addressed back in May, C.S. asked about rinsing Type I (chromic acid anodizing) coatings vs.

Published: 8/1/2008

BLACK SUBSTANCE ON RAG
We are yellow chromating aluminum alloy 360 die castings. After processing, a grey/black material appears on rags used to wipe the parts. What is this material, and can it be prevented?

Published: 8/1/2008

TYPE I VERSUS TYPE II ANODIZING
Question: I operate a small sulfuric acid anodizing line and have a question about chromic acid (Type I) anodizing.

Published: 8/1/2008

Anodizing Fundamentals
Question: I have just started my enterprise and couldn’t find any information on anodizing using a high start-up amperage versus a more slow and even increase of amperage within the first seconds of having the load in the tank.

Published: 8/1/2008

CALCULATING ANODIZING RATE FOR TYPE II AND TYPE III COATINGS
Question: We’re new at anodizing and we would like you to explain how to calculate the time it takes to get a given coating thickness when you have more or less “standard” anodizing conditions.

Published: 5/1/2008

ONGOING DISCUSSION OF DI WATER QUALITY
Question: In an article that you wrote in the Aluminum Anodizing Clinic regarding the quality of deionized water, you said that high-quality DI water is very important in the anodizing bath.

Published: 2/1/2008

Oxalic Acid Anodizing—the Basics
Question:  What are the general processing conditions for oxalic acid anodizing?

Published: 2/1/2008

Oxalic Acid Anodizing—the Basics
What are the general processing conditions for oxalic acid anodizing? Are they essentially the same as for sulfuric acid? Can titanium racks be used successfully in this process?

Published: 2/1/2008

Duplex Sealing With Nickel Acetate and Di Water
Question: In past Anodizing Clinics you have talked about duplex sealing using, first, a relatively concentrated (3–5% by weight) nickel acetate bath followed by sealing in deionized water as a good way to seal dyed anodic coatings.