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

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 32140

Precipitant in chrome plating water treatment


2004

I am doing research on removal chrome of the rinse water of plating plant by ion exchange column. My feed water is the rinse of chrome plating, contain mostly Cr(VI), when pass thru the strong base anionic ion exchange column, a lot of brown precipitant form inside the column. Sent to analytical lab, and the answer for these is unknown substance, although they can point out what metal in it, but not pin point "this is Cr(OH)3" or similar. If you can have a go on what is this precipitate? The precipitant is not dissolved by caustic or acid, to me...

Oliver Shallcross
Environmental - St Louis, SA, USA


2004

I give up, Oliver, where is St. Louis SA? But if you're lobbying for the cannonization of Satchmo, I'm on your side :-)

My bet is that that brown precipitant is oxidized and destroyed ion exchange media. Hex chrome is very hard on resin.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



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.