Yeah, not doing it myself, but I would like to be better prepared, to appear
less of my normally rube-ish self, as I start the procuring process.
I'll be anodizing 1" x 12" rounds w/ tapped ends, and drilled 1/4" plate,
anywhere from 8"x36 to 12"x48, with some drilled holes.
Ito of quan, I'd proly be doing any where from 25 rounds/6 plates to mebbe 4
times that, 100 rounds/25 plates or so, at one time.
How finished does "finished" have to be, for "good" anodizing results?
For example, is typical alum round bar, extruded, and scotchbrited on a
lathe a good enough finish?
Ito "sandpaper grit" finish on plate, how coarse sandpaper is too coarse?
60? 120? 240?
How does their caustic bath act, ito softening sharp edges? Loosening
tapped holes? Should these be plugged?
I'm assuming these caustic baths will obviate any cleaning/degreasing on my
Any stories/experiences? Any sample prices?
So far, my understanding is that regular un-colored anodizing is about 1/3
the cost of colored anodizing. And that the sometimes brilliant finish you
see is not anodizing but a kind of clear-coating on top of the anodizing --
extree charge, no doubt. And also extra protection?
And a general Q:
How does uncolored anodizing differ from regular aluminum oxidation?
Rephrased, why does un-colored anodizing look so good, and oxidized aluminum
look so crappy? Isn't it all Al2O3?
And another general Q:
What alternatives are there to anodizing? Paint/laquer? Powder metal
coatings? Any "stains" for alum?
Any opinions on the relative merits of these, cost or otherwise?
- posted 12 years ago