Breathe easy! No registration or passwords -- nothing to hack.
... and no maddening pop-up, sticky, or floating ads :-)

Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

How to do Aluminum anodizing




2006

Q. How to do aluminum anodizing? What is the machinery required? What are the shades? What are the chemicals used in it. Please mail me as soon as possible.

Rohit Verat
industry - Mumbai, Mahashtra, India



probertEthumb Aluminum How-To
"Chromating - Anodizing - Hardcoating"
by Robert Probert

You have a better chance of winning the lottery than of not liking this book. Finishing.com has sold 875 copies over the years without a single return request :-)

"The Surface Treatment & Finishing of Aluminium and Its Alloys"
Wernick, Pinner & Sheasby
from Abe Books
or eBay
or Amazon
(affil links)

2006

A. Hi Rohit.

There are many types of anodizing for many purposes, and many methods, but electrical power is applied to the part, usually while immersed in sulfuric acid, to impart a hard aluminum oxide finish. Nearly any shade of dye is available except white. But not much real progress can be made until you describe the parts; for example, the chromic acid anodizing of aircraft parts is very different from the hardcoat anodizing of wear surfaces, which is very different from the bronze colored anodizing of architectural extrusions. Good luck.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey



2006

A. For plant design, equipment, materials of construction, solution heating & cooling, etc., see Electroplating Engineering Handbook [adv: this book on Amazon, AbeBooks, eBay] . A plant with manual operations will differ from one with automated parts transfer in both initial & operating expense.

Use the 'Capital Equip.' link below to find vendors of rectifiers (power supplies), tanks, etc. Note that a hard anodizing rectifier must be capable of higher output voltage, 100 VDC, vs. 25 VDC for conventional anodizing.

US Specialty Color has a dye Color Chart and under Product Information, anodizing pretreatment chemicals, dyes and sealants.

Robert Probert's book, "ALUMINUM HOW-TO -- The Chromating - Anodizing - Hardcoating Handbook" details the anodizing procedures.
S. Kawai's book, Anodizing and Coloring of Aluminum Alloys [affil link on Amazon], ISBN 090447724X, describes electrolytic ("two step") dyeing quite well. This is rather a specialty process for architectural aluminum and cookware in the USA, but seems more generally used in Japan.

Probably, you must establish a record for high quality anodizing over many years before chromic acid anodizing of aircraft parts is a consideration.

Before investing any money, be sure environmental permits can be obtained.

Ken Vlach [deceased]
- Goleta, California

contributor of the year Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.




May 18, 2012


Q. My client wants to have an antique bronze anodizing finish on aluminium window profiles. How do I achieve this -- what is the process?

Sunil Suryavanshi
Mumbai, India


A. Hi Sunil.

This would be sulfuric acid anodizing, with the coloration applied by what is called a two-step process rather than an organic dye. Metal salts are electrically deposited into the anodized pores before sealing, making the color very lightfast.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
May 21, 2012




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA