No passwords, No popups, No cost, No AI
we earn from your eBay & Amazon purchases

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
curated with aloha by
ted_yosem
Ted Mooney, P.E. RET
- Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


  pub
  The authoritative public forum
  for Metal Finishing since 1989

-----

Characteristics of chromium plating wastewater




February 5, 2009

hi
I'm an undergrad student who is currently working on chromium wastewater treatment for my plant design class. I would like to inquire about the typical wastewater characteristics from coming from chromium plating?
thank you

Veronica Tupaz
student - Philippines



First of two simultaneous responses --

The waste water composition from chromium plating will differ depending on if you are using the traditional hexavalent form or the more environmentally friendly trivalent form.

Both will contain chromium metal in an acidic stream. The state of the chromium will differ with the process. The hexavalent stream would also typically include sulphates and if a proprietary solution is used (for decorative chromium plating) could also contain fluorides and borates. Some of the chromium present may be divalent or trivalent although the process is hexavalent. Others (proprietary hard chrome) may contain other sulphates which would include chromium/MSA complexes. Trivalent baths would typically have chlorides rather than sulphates in the stream and contain trivalent chrome compounds as well as traces of proprietary chemistry.

Gene Packman
process supplier - Great Neck, New York
February 7, 2009



Second of two simultaneous responses --

It cannot be answered as some shops are slop shops and some are state of the are in pollution prevention. Also most chrome shops do other types of plating, at least one kind of nickel and up to 3 kinds of nickel, plus who knows what else.

James Watts
- Navarre, Florida
February 7, 2009




(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:

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


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"