No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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

  The authoritative public forum
  for Metal Finishing since 1989

-----

Gel Passivation

We are process vessel manufacturers and have been asked to "gel passivate" the external surfaces of a small vessel. What is gel passivation?

August Cook
- Syracuse, New York
2001

They are most likely referring to a hexavalent chrome conversion coating that is used to passivate zinc or zinc-alloy platings. This conversion coating is only angstroms thick, but it is a hydroscopic gel. This type of passivate is part of all typical zinc or zinc-alloy platings.

Tim Neveau
Rochester Hills, Michigan
2001

Mr. Cook:

There are gelled products on the market for "painting" onto the surface of stainless steel where immersing in a tank is not possible. We market safe and environmentally friendly products based on citric acid to do this, if you need help. These products produce a surface which does not have free iron or other exongenous materials on them, and improves corrosion resistance dramatically, especially in the weld areas.

Regards,

Lee Kremer
Stellar Solutions, Inc.

McHenry, Illinois

2001

(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: