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Chipping anodized aluminum

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Chipping anodized aluminum

Old 05-16-08, 10:35 AM
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Chipping anodized aluminum

I'm looking at a Banshee Scirocco in their "Mercury" color, which I've read is anodized aluminum. I'm just wondering if anyone knows how easily this kind of finish chips. I've heard that some metal chips easily when it's been anodized.

Photo of mercury Scirocco frame
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Old 05-16-08, 10:51 AM
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I work for an architectural product manufacturer and we use primarily aluminum. When you anodize aluminum the finish will not chip like paint. It is also very difficult to even scratch.
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Old 05-16-08, 11:41 AM
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I haven't had anodizing 'chip' but it does scratch if it's deep enough to get through the anodized layer. Anodizing is not really plating, per se, but rather it metalurgically alters the outer surface molecules of the aluminum. It is also colorless - - the color is provided by colored dyes added in the process.
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Old 05-16-08, 01:17 PM
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Originally Posted by dminor View Post
Anodizing is not really plating, per se, but rather it metalurgically alters the outer surface molecules of the aluminum.
It chemically alters the outer surface. Simply put, it oxidizes the outer surface. It's more complicated than that but you are forming aluminum oxide on the outer surface. Aluminum oxide is known as alumina, corundum and, in gem form, as rubies and sapphires. Next to diamond (which is far, far harder) corundum is the second hardest mineral known and is commonly used in sandpapers.

And that ends the chemistry lesson for today boys and girls
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Old 05-17-08, 10:23 AM
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I love anodized finishes. I wish more bikes had 'em, but unfortunately that would require bike makers to do a better finish job on their raw frames (brush finish, grind the welds, etc). It's a very nice, durable, good looking finish option. But for a bike maker I suspect it's more expensive than paint.
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Old 05-17-08, 10:26 AM
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Originally Posted by cyccommute View Post
It chemically alters the outer surface. Simply put, it oxidizes the outer surface. It's more complicated than that but you are forming aluminum oxide on the outer surface.
Yeah, that's what I meant to say in my layman's fashion. A deeper, stable oxidation.
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Old 05-17-08, 11:26 PM
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if you dont want it, soak it in oven cleaner and it comes right off allowing you to paint it any color you want. kinda of not what you're asking for but just putting some info out there
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Old 05-18-08, 09:40 AM
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Originally Posted by supra25 View Post
if you dont want it, soak it in oven cleaner and it comes right off allowing you to paint it any color you want. kinda of not what you're asking for but just putting some info out there
And with just a few more steps you can have alum for making pickles
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