Home
 
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
SEARCH🔍
the Site
no_pop_no_spam2

World's top finishing resource since 1989
Chime right in - No login req'd

topic 29696

Poor plating results on steel sand-blast parts



2004

Out-sourced some steel parts for black zinc plate at a local plating house. When received back, the finish appeared nothing like zinc plate, but rather a flat black chalk like finish that scratches rather easy. These parts were sand-blasted previous to plating. My question, is this a typical result to expect as a result of the sand-blasting. What can we do to prevent this from happening again? Thanks so much for any and all replies.

Gary Allen
Engineering/Manufacturing - Binghamton, New York, USA


2004

Gary,

The brightness, gloss, of the finished product is influenced heavily by the condition of the base material. In this case, a sand blasted surface would be very hard to "brighten" during the zinc plating process. I would expect to see a matte black finish after chromating. And yes, the chromate will scratch easily, especially on a blasted surface. However, the finish should not be "chalky" or "powdery" or easily rub off. If you need a better looking finish, avoid blasting.

Steve Parkhurst
Job Shop - San Diego

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 SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA