finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
(current
topics)
topic 2795

Black finish on Aluminium


(1999)

Hi,

1) We occasionally produce aluminium parts for optical purposes, lens holders for example. We need to find a suitable method to blacken their surface with a non-reflective, non fluorescent black matte finish. Preference for a simple method, dipping, anodizing, etc. No problem if further dying with a paint is needed. Should not make substantial changes to dimensions. Another option would be to coat the aluminium with a thin layer of copper (we suppose copper is easier to blacken, but how?) As a last resort we used a matte black spray paint but unfortunately some of them are slightly fuorescent.

2) Can you give us the complete reference of the book on metal finishing techniques edited by McGrawHill? We cannot find it here. Out of print? Thanks

Pedro Fernandes
- LISBOA


1). The dimensional change in anodizing is inherent, not a matter of technique; when you convert aluminum to aluminum oxide, you gain thickness. Normally approx. 40-50 percent of the specified thickness.

2). Unfortunately, I don't know what book you're referring to.
Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


(1999)

Mr. Pedro Fernandes ..... Biodinammica...... Lisboa When Anodizing to get the disired apparpence material is very important, After that there is the type of pretreatment Such as non etch or etch, etch is very good for a matte finish, my best success has been with a sulfuric Acid type solution black dye color is controller by depth of anodizing, temperture and concertration of dye.

Chris Snyder
plater - Charlotte, North Carolina



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.