Annodized Al Ally

[wes616]

Anyone have any idea what color that Al Ally Would be if Annodized Type 2 Class 2, I believe that the Ally is 2024.

 

[Sparweb]

Take your pick:

There are a variety of dyes that you can choose from.


Read this about 2024 aluminum:

http://www.alphametal.com/tech_notes.htm

Steven Fahey, CET

 

[wes616]

Thanks Steve,

I guess I left out the most important part: "Clear / No Dye" There is a small arguement going on in here that it the type 2 class 2 greys the metal. Is that true?

 

[WKTaylor]

wes616

I seem to recall that this finish would tend to have a light mottled gray coloration with a "semi-gloss" to "flat" luster... depending whether it was hot-water sealed, or not.

Also... At an angle, and/or with polarized light (including sunlight) the appearance may also have a slight holographic translucence.


Regards, Wil Taylor

 

[FieldTeam]

According to MIL-A-8625:
Type II is sulfuric acid anodizing, conventional coating produced from sulfuric acid bath.
Class II is dyed
I would take this to mean you can not have "Non-Dyed" and still be class II.
Class I is non-dyed.
It goes on to say on class I that any coloration resulting from anodic treatment with various alloy compositions shall not be considered coloration. The charistic color imparted by the sealing process shall also be considered non-dyed.
I believe this spec goes on to describe quality inspection of parts.

 

[WKTaylor]

Fieldteam...

Your assessment is correct.. Wes616 is actually describing non-dyed sulfuric acid anodized coating per MIL-A-8625 Type II Class 1.

Regards, Wil Taylor

 

[wes616]

Thanks for your help guys. I guess that this material finnish decision has been passed onto manufaturing (cost)and industrial design (asthetic) now. We in engineering gave a recomendation, but now it is out of our hands. Someone else was working on that and I'm not sure what the solution is. Will let you know if I find out.

Thanks for your help though.

 

[ornerynorsk]

Final coloration/light properties on clear anodize all depends on your metal finish prior to anodizing. You can run the spectrum all the way from silver frost to a "yucky" mottling that will mimic galvanizing.

 

[Sparweb]

"...and I'm not sure what the solution is..." No pun intended?



Steven Fahey, CET