finishing.com -- The Home Page of the Finishing Industry

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
Live! From Pine Beach NJ: The world's most popular metal finishing website, and the internet's friendliest corner

topic 17651

Reaction of aluminium with nitric and sulphuric acids and water


2002

Hi,

A few months ago I read about an aluminium reaction with acids: dilute sulphuric acid and nitric acid and water (combination of three) that aluminium reacts with that solution and give brightness or changes the color of aluminium. But unfortunately I lost that link.

Please tell me if it is possible that we can change the color of aluminium with reaction of acids or with such composition. Please respond to me.

Aziz Khan
- Kolkata, Maharashra, India


2002

Personally, I've never heard of such a coloring process, Aziz. However, there is a "bright dip" process for brightening aluminum which usually uses nitric acid and phosphoric acid. I don't know whether it is possible to do that process with sulphuric acid in place of the phosphoric acid; but since I've never personally heard of it, I must doubt it unless I am advised otherwise. Good luck.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey
We need "Aloha" now more than ever



August 2, 2012

Q. Dear Sir,
I recently received some drinking water results which showed aluminium levels exceeding WHO permissible levels in drinking water.

When I reported this matter to the relevant authority, their response was that nitric acid added to the water sample to stabilise it had triggered the level of aluminium in the drinking water sample.

Please comment.

Thanking you in anticipation.

Vijay

G. Vijaya Kumar
health office - cameron highlands, malaysia


September 17, 2012

A. Dear Mr. Kumar,

Nitric acid could dissolve aluminum, but you must have some aluminum to dissolve when the nitric acid is used... Where are you measuring high levels of aluminum, how are you measuring it and whether you are using aluminum or not, are things you and we must know in order to answer your question.

If you specify the situation we may be able to help. Regards,

Daniel Montanes
Self-Drilling Fasteners Manufacturer - Cañuelas, Buenos Aires, Argentina



If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT 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


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.