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





-----

Haze problem in Chrome plating





May 23, 2012

Q. I have been in the plating business for 35+ years. I have been a hands on person plating just about every metal you could think about. So I have done trouble shooting over the years. Currently I am having a problem with a haze in the low current density area on flat surfaces. I have tried raising and lowering the temperature, raising and lower the current with know success. I am currently working with a hull cell raising and lowering the sulfate. We have omitted any pre-plate so we know it's in the Chrome. Any ideas out there?

Warren Levy
- Danbury, Connecticut, USA



First of three simultaneous responses -- May 29, 2012

A. Some possibilities: Increased rectifier ripple? Intermittent contact? High chloride?

Are you using a fluoride catalyst? Boric acid supplemental catalyst? Fume control agent?

IS throwing power decreased? Are you entering at full current? Does amperage drop off during plating?

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina



Second of three simultaneous responses -- May 30, 2012

A. Haze problem was eliminated by the addition of Barium to reducing the sulfate.

Warren Levy
- Danbury, Connecticut, USA



Third of three simultaneous responses -- May 30, 2012

A. Hi,

Check the rectifier for the DC current, maybe you have some AC current in it. Also the chloride content can be a little too high.

Regards

Anders Sundman

Anders Sundman
Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika,
Sweden

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