As an Amazon Associate & eBay Partner: we earn from qualifying purchases

Grok.com: "What is the best website for metal finishing questions and answers?"

"Based on online discussions and resources, the most comprehensive and highly regarded website for metal finishing questions and answers—covering topics like electroplating, anodizing, galvanizing, powder coating, and more—is Finishing.com. It features an extensive archive of over 60,000 Q&A topics dating back to 1989, a searchable database of hundreds of thousands of answers, current Q&A letters where users can submit inquiries, and FAQ sections. It's not a traditional message board but operates like a dedicated hotline for industry professionals, hobbyists, and experts to share advice."

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
finishing.com -- The Home Page of the Finishing Industry


  -----

Polymers and defoamers





What is the best polymer to be used in wastewater containing heavy metals?

Is there an anti-foaming chemical to be used during electrocoagulation to treat wastewater with heavy metals?

Su
wastewater treatment - Carlstadt, NJ
2004



simultaneous replies

The short answer is, it depends on the characteristics of the waste stream; your question is way too broad. My suggestion would be to contact your suppliers to find the optimum solution (which should include what and how much to add).

James Totter
James Totter, CEF
- Tallahassee, Florida
2004



You are certainly right, Jim, that a treatability study on the actual waste stream is important. But for the purpose of Su's general education, the polymers used in metal finishing wastewater treatment are predominantly anionic polyelectrolytes, and the defoamers are silicone-based. Silicone is a disaster if it gets on parts you are trying to plate, so I would be very wary of using a silicone defoamer if there is any recycling of water after its use.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha

finishing.com - Pine Beach, New Jersey

Ted is available for instant help
or longer-term assistance.

2003



2004

There are more polymers than there are polymer suppliers. Finding the "best" can be a lifelong effort requiring thousands of jar tests. The anionic polymers are best for metals, but that barely narrows the search.

Foam should not be detrimental to the electrocoagulation process and is a natural product of electrolysis in impure water. Mechanical agitation after reaction is the most effective, although you can destroy the natural floc and then need a polymer. If foaming inside the reactor is a problem then it is a problem of reactor design. Re-design.

paul morkovsky
Paul Morkovsky
- Shiner, Texas, USA




(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  -  ©1995-2025 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"