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

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
ted_yosem
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
  mfhotline


  -----

Chromating 6061 T6511




2005

For creating better corrosion resistance (against ASTM ASTM G85 -94 A3 (SWAAT)) on 6061 T6511, I am considering conversion chromating. Since it concerns an automotive application, hexavalent chromium is out of the question. Compromising surface finish quality is also not allowed (since the product has sealing surfaces for O-rings).

- Is there a conversion chromating process that meets above requirements?
- Would anodizing meet the above requirements better?
- For volumes >1 million pieces. a year for products 30x20x20 mm what would be cheaper: anodizing or chromating?
- What is the difference between transparent and yellow chromating?

Thanks in advance for all replies.

Jaap Hoftijzer
Automotive Supplier - The Netherlands



Anodizing will provide superior corrosion (and scratch) resistance and will cost more. I'll get some argument on this one...but, if there is no color, there is no chromate film, so "clear" chromate is a myth. No color = no chromate.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina
2005


Although it is a myth, do you know the difference between so-called clear chromate conversion coating and yellow chromate conversion coating?

Jaap Hoftijzer
Automotive Supplier - The Netherlands
2005




(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"