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topic 11463

Streaks on hard anodize surface


 

What would cause a wood grain appearance on hard anodized parts? It looks like streaks of thick anodize over flash hard anodize. Hard anodize should have a granular dark look, but this one is definitely different. Any ideas?

Mario Rodriguez
- Phoenix, Arizona, USA


 

Can you verify if the anodize is the same thickness over the entire part? I have seen grain on anodized aluminum which seemed to be grain structure, but which had some swirl to the pattern which I might have thought looked like woodgrain. Can you strip the anodize, then etch the aluminum using some laboratory etch which would develop the grain?

tom pullizzi portrait
Tom Pullizzi
Falls Township, Pennsylvania



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