Jack,
I did lots of anodising with very basic equipment requiring only a
large plastic bucket/tub and a variable 16volt DC electricity supply. The
electrolyte was 10% sulphuric acid and the porous anodic film built up is of
pure aluminium oxide which is extremely hard (grindstones are made from it).
On removal from the tank the object is rinsed in water and immersed in dye
which migrates into the porous surface. Boiling the object in water closes the
pores leaving the dye visible in its glassy coating. Beware of fingerprinting
at this stage or your details will be preserved for evermore.
Ordinary fabric dyes work well but may not be UV proof. I still have a stock
of about 20 colours of Sandoz anodising dyes but mailing these may be
questionable. I'll happily respond to individual queries.
P.S. You may notice that Apple make great use of anodised aluminium which
might just have been inspired by one Jon Ive who did his first ever anodising
under my guidance while a student at Newcastle Polytechnic (Now the University
of Northumbria). I have pictures!!
Tony M.
----Original Message----
From: [email protected]
Date: 20/09/2015 1:09
To: "'Dave Bell'"<[email protected]>, <[email protected]>, <[email protected]>
Subj: RE: Looking for suggestings on surface treatment of my aluminum cross
sundial "Time to Reflect"
Tony Moss did a presentation somewhere a few years ago on
anodizing aluminum. I have a vague memory of his doing something at
one of the NASS conferences, but it could have been the BSS bulletin or an
email to this list. I think he used some kind of water soluble coloring
that was absorbed by open cells in the aluminum which were then closed up by
the thin film of oxidation. I probably have this completely garbled
but he did have a “how to”.
Tony, can you provide a link to your anodized aluminum how-to?
Jack
From: sundial
[mailto:[email protected]] On Behalf Of Dave Bell
Sent: Saturday, September 19, 2015 7:08 PM
To: [email protected]; [email protected]
Subject: RE: Looking for suggestings on surface treatment of my aluminum
cross sundial "Time to Reflect"
I would suggest anodizing!
The best etch for aluminum is not acid, but alkali, and following
that by staining, essential *is* anodizing.
Here’s one reference on various finishes:
http://www.saf.com/how-to-specify/how-to-decide-between-anodizing-painting-and-powder-coating/
Note, “Anodizing is unaffected by sunlight”
Dave
From: [email protected]
[mailto:[email protected]]
Sent: Saturday, September 19, 2015 3:34 PM
To: [email protected]
Subject: Looking for suggestings on surface treatment of my aluminum
cross sundial "Time to Reflect"
Hi Everyone,
I am looking for suggestions on different
types of surface treatment that I could do on my aluminum cross sundial besides
powder coating and enamel paint in the lettering. I could anodize
it but I am not sure it would hold up in the sun. Would some kind of light
acid etching work or some kind of staining on the aluminum?
Thanks,
Ken Clark
Elizabethtown, PA
The following is my post from Facebook and link.
Time to
Reflect sundial.
This is a sundial that I been working on
for over a year. I designed this aluminum cross sundial on CORELDRAW
which was saved as a DXF file and converted to SOLIDSWORK program and CNC by
Max Machine of Elizabethtown, PA.
I am still looking at different
options for the finish. I have been thinking of powder coating it
blue-green patina like the statue of Liberty.
This is still a work in progress and is
mounted over my well pipe for now. I still need to fabricate the mounting
bracket and will be bolted to probably an 18 inch diameter concrete base.
I need to find the right location or church that will accept this sundial.
Thanks,
Ken Clark
https://www.facebook.com/media/set/?set=a.10205271882252638.1073741827.1114522471&type=1&l=0a021f4dfa
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