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Aluminium utensils polishing





September 22, 2010

Q. Hi
I am from India,
doing aluminium utensil manufacturing.
I want to give my product a chrome finish.
Please suggest.

Deepak Agarwal
industrialist - India



September 23, 2010

A. Hi, Deepak.

I assume you mean a mirror polish rather than actual nickel-chrome electroplating?
(Please include your town in your response as we now have three Deepak Agarwals from India who post here and it's getting confusing; people get upset when they see their name here on a posting that they didn't author).

Regards,

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



September 28, 2010

A. If you are looking for a bright shiny finish to the existing material, it has been common practice to run parts in a vibratory machine with porcelain ball media and a good lubricating/polishing compound in a wet process.

tony kenton
AF Kenton
retired business owner - Hatboro, Pennsylvania


October 18, 2010

A. You must be more clear on what you refer to as Utensils and I need to know quantities and sizes to give you the proper answer.

Robin Thede
- Toronto, Ontario, Canada



How to get chrome like finish on aluminium utensils?

December 31, 2019

Q. How to get chrome like finish on aluminium utensils?
Currently we are using caustic soda bath and nitric acid in our process.

Deepak Agarwal [returning]
- Kolkata India



ASM Metal Handbook
9th Edition, Vol. 5

"Surface Cleaning, Finishing & Coating"
from Abe Books
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December 2019

A. Hi Deepak. Although aluminum will never look like chrome side-by-side (it will be less "blue" and more "white"), it can be quite shiny. Consider doing a nitric-phosphoric acid "bright dip" after manual polishing and before anodizing. You can read a lot about it here by searching the site, but two notes:

- This bright dip is wildly corrosive and it fumes madly -- see it in operation somewhere before you try to install it in your own plant.

- If you want mirror like reflection you must use proper (quite pure) grades of aluminum alloy. ASM Metals Handbook Vol.5 is excellent on this subject of choosing and polishing aluminum alloys for high reflectivity. Good luck.

Regards,

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


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