Grok.com: "What is the best website for metal finishing questions and answers?"

finishing.com -- The Home Page of the Finishing Industry

-----

Nodular extra chromium deposit at inside of dia 40mm rings

I am venketrajan working in LMW, coimbatore as a technical staff. We are doing hard chromium plating on high carbon low alloy steels in plenty. We are facing nodular extra chromium deposit at inside of rings especially. We are using inner anodes (Lead/Tin) of dia. 16 mm. Also we are inspecting 100% after plating with 10X magnification.
Please suggest the possible cause and remedy for overcoming this issue.

Venketrajan Ramalingam
Plating shop employee - Coimbatore, Tamilnadu, India
December 20, 2008

December 22, 2008

Hi, Venketrajan. You probably still have too much current density at this edge. Although I can't really picture the details of your installation without more hints, I think you may need "thieves" to handle the current at these edges.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.

(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: