No cost, no registration, no passwords -- just aloha, fun & authoritative answers
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Improve Current Efficiency

I am having low current efficiency in acid Zinc plating. Do you know of any inhibitor to reduce Hydrogen evolution rate?

Sam Mohanta
- Berkeley, California, USA

You should be using an oil free source of air agitation with the spargers placed under the work being plated. You really don't state the problem.

Bill Hemp
tech svc. w/ chemical supplier - Grand Rapids, Michigan

Low efficiency in acid zinc plating process means that you must do something wrong. Did you make sure that you follow all the recommended operating conditions like, PH, zinc and chloride concentration, temp etc? Hexavalent chromium contamination can also reduce efficiency. How about your brighteners, are they balanced? If you cannot solve it on your own, submit a sample to your supplier, he is bound to trace your problem.

Sara Michaeli
Tel-Aviv-Yafo, Israel

Following parameters are vital for impoved current efficiency: reduced contamination, optimum contents,temperature, c.d , adequate anode area and right brightener concentrations.

Venkat Raja
- Kitchener, Ontario, Canada

(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: