Re: Powdercoating vs anodizing - how to distinguish?

From: clay (a_designSPAMSPAMSPAM_at_citlink.net)
Date: 08/25/04 

Date: Wed, 25 Aug 2004 18:02:09 GMT

Scratch test. Powder coat is very thick in comparison to anodizing.
Impact. Most if not all powder coat will deflect impact. anodizing, will
dent.

melon wrote:
> Hi!
> Is there a simple nondestructive method to tell whether aluminum is
> powdercoated or anodized?
> Coating is black. I tought of rubbing surface with brake fluid (shouldn't
> harm anodization, should bite powdercoat), but I've heard that some
> powdercoats are resistant to brakefluid.
> Electrical conductivity (both are insulators)?. Flame heating (will impair
> alloys' structure)? A drop of some acid or alkali?
> Any ideas?
>
> Thanks!
>

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