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





-----

Trivalent Zn Black Peels off





October 16, 2008

I have been using finishing.com from 1999 to successfully resolve work place issues. and I thank all the resourceful professionals who helped me out.
Coming to the problem in hand,
I am using a subcontractor to do trivalent zn black passivation on M3 Screws and I have come across peeling off problem. this happens if I rub the parts by hand or use a tool to tighten the part.
1. I want to Isolate if the peeling off is limited to Passivation or includes plating
2. How to resolve the issue
Please help

Muralidharan G
Customer of plating shops - Chennai, Tamilnadu, India



October 21, 2008

Dear Mr Muralidharan,

please post the picture of the defective screw and oblige.

warm regards,

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind
supporting advertiser
Bengaluru, Karnataka, India
saify logo


none
finishing.com is made possible by ...
adv. 
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