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





-----

Is 'white' and 'black' rust considered 'ferrous corrosion'?





February 16, 2012

Q. We have some 1050 steel parts that are clear zinc plated and then sent through a 50-hr salt spray test. The test samples exhibit the "white" and "black" corrosion but no red rust. I've read on this website before that the white corrosion is a result of the zinc and not the underlying material, so I'm guessing that it cannot be classified as ferrous corrosion. But what about the black rust? Is this a result of the underlying material, and could it be classified as ferrous corrosion? How does this black rust affect the material compared to any red rust?

Thanks for the insight.

Tyler

Tyler Butel
Engineer - Edmond, Oklahoma, USA


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

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