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

HomeFAQsBooksHelpWantedAdvertiseForum
(current
topics)
topic 4432

Pink Brass


(2000)

We are currently etching brass using ferric chloride with a nitric acid rinse. Occasionally the brass turns pink. Any idea why and how we can prevent it?

Thank you.

Michael Cocco
Eastern Etching - Chicopee, Maryland


(2000)

Dear Mr Micheal,

The pink rose like colour is an account of Tarnishing occurring immediately after the etching. This happens faster if you are using heat for drying the brass.

To prevent this use 20 gms / lit of Sodium dichromate to antitarnish the brass before drying.

Regards,

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

saify logo



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.