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

-----

Do we need sealing after coloring of hard anodized parts?

Is it important to seal after coloring of hard anodized parts. I have a design requirement that prevents me from sealing. However I need the parts to be colored for identification. I am confused. please help.

G. Muralidharan
steering systems - Chennai, TamilNadu, India
2006

Colored coatings should be sealed for lightfastness and to prevent absorption of stains and dirt. But hard anodized coatings are usually not sealed because it softens the coating.

As a guideline for your situation, it is reasonably common to dye "Type 2-1/2" hard coatings and leave them unsealed. I'd say you can dye the parts for identification without sealing -- although they will be subject to absorbing stains and dirt. If you are able provide further details of your situation hopefully we can probably answer better. Thanks.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006

(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: