Home /
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


Patches Chrome Plating


What will organic contaminations do in Hexavalent Chrome plating bath? How does one analyze and treat?

Payal Mag
- Charlotte, North Carolina


Most organic material will be oxidized by the chromic acid and the chromic acid will be reduced to trivalent chrome. If there is any organic matter in the tank it will probably be charred black mess.

George Shahin
George Shahin
Atotech - Rock Hill, South Carolina


My understanding of hard chrome is poor, however if organics contact hex. chrome. The organic will be cleaved to smaller branches by hex chrome which in turn will be reduced to trivalent chrome. Skim tank and catch the junk floating, then stop the source. High Current Dummy to oxidize the tri chrome back to the nasty six. Double check your vent and go home, by AM back to another day in metal finishing.

Jon Quirt
plating shop - Fridley, Minnesota


Nothing that will actually interfere with plating. However removing all the caked out muck at the bottom of the tank is quite painful every now and then.

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

adv.: ResinTech banner

(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:

Chemicals &
Consult'g, Train'g
& Software

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