Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

What is zinc dichromate type II class 3?





2005

What is zinc dichromate type II class 3?

Bantine Lee
Sinjung - Chung wa, Taiwan



2005

Type II generally refers to colored chromate conversion coating applied to zinc following plating. Class 3 most likely refers to the thickness from a specification callout such as the former QQ-Z-325 for which class 3 denoted a minimum thickness of 0.0003 inch ( or about 5 micrometers ). You really need to go back to whoever wrote the finish callout and get their interpretation of the callout; if this callout came in on an order to my shop (and we do get several strange callouts like this), I'd put the responsibility of defining the coating back on my customer ( and not on some internet hacker that has nothing better to do than respond to finish.com letters! )

milt stevenson jr.
Milt Stevenson, Jr.
Anoplate Corporation
supporting advertiser
Syracuse, New York
Anoplate banner



none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages



(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:

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


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA