Anodizing can be done with an array of additives to produce different colors of varying opacity. As I recall, anodizing is a conversion coating that converts the surface to an aluminum oxide of a different structure than that associated with corrosion to the oxide form. Increased hardness and corrosion resistance relative to the untreated (bare) aluminum are a benefit of the process.
Charles T. Young
> I apologize in advance to anyone who declares me a heretic for altering the
> original finish on a Campy part... I like the shine on a new-looking part
> that requires additional polishing effort over the dull glare of a original
> Please correct me if I am wrong, but I thought to "anodise" Campy parts
> meant to coat the alloy metal in a protective black coaating. The anodised
> finish is a real bear to remove manually or by chemical means - unless there
> is a constant rubbing motion that literally "wears off" or scratches the
> finish. The protective coating applied to Campy parts appears to be a thick
> clear chemical that almost seems to bond to the metal.
> However I have a question about how to completely and easily remove the
> clear protective finish applied to 70s era Campy parts... In the mid
> 1970's, Campy started to apply a protective finish to inhibit Campy alloy
> parts from dulling. I have several older parts that have "gone gray" in
> color because the alloy has discolored with the decades, even though the
> protective finish remains. I have only been able to remove this dull finish
> with extended use of fine steel wool. Alloy polishes such as "Mothers",
> "Simachrome", or "Met-All" do not seem to have any impact in polishing the
> alloy because they cannot penetrate the Campy protective finish. I wonder
> if a semi-abrasive like "Brasso" for alloy parts may give better results...
> any suggestions?
> Thanks, Steve Neago
> Cincinnati, OH
> ----- Original Message -----
> From: <firstname.lastname@example.org>
> To: <email@example.com>
> Cc: <firstname.lastname@example.org>
> Sent: Wednesday, April 17, 2002 6:02 PM
> Subject: Re: Re: [CR]Polishing those hard to get to parts? (fwd)
> > Yea I just got home & read the label.However aren't most Campagnolo
> components anodised?This layer of protection might be ruined by the
> Wenol.Then I guess you could continue to use it on the base aluminum
> material.I have used it successfully on many items but have not used it on
> anything made from aluminum.
> > Anodising is a chemical process which basically seals the aluminum surface
> from harmful corosive elements,which can deteriorate the aluminum
> material.If this seal is already nonfunctional then treating the aluminum
> with Wenol would restore the shine but not act as a protective barrier as
> would anodising.
> > The question is does Wenol attack the anodising
> > & thus leave the base aluminum more susceptable to corrosion.
> > I am not a chemist.Just seat of the pants logic here.
> > Nick Zatezalo
> > Atlanta,GA
> > On Wed, 17 Apr 2002 14:46:24 -0800 Chuck Schmidt
> <email@example.com> wrote:
> > firstname.lastname@example.org wrote:
> > >
> > > Hey Chuck!
> > > I am not positive,but I seem to remember the label on Wenol states:That
> it is not recommended for use on aluminum.I'll check for sure when I get
> home this evening.
> > > Nick Zatezalo
> > It says not for use on _anodized_ aluminum. Not the same thing!
> > Anodizing is a sealed surface that polish doesn't do a thing to. It
> > works _GREAT_ on aluminum!
> > Chuck