No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Need better cleaning before zinc-iron plating

We are experiencing problems in our zinc-iron line with a part that presents a black spot after tack welding and before hand brazing, according to our braze rod supplier: "It appears to be oxidation due to burning off an oily residue". Can you suggest a procedure to overcome this issue, we suspect we are not using the appropriate cleaning method.

Currently to get a good part it needs to go twice through the process line, been stripped after the first time through the line.

Thank you very much for your help.

Arnoldo Vargas
plating shop employee - Cartago, Costa Rica
March 7, 2011

Hi, Arnoldo.

Are you doing rack or barrel plating? What is your current pretreatment: soak clean-electroclean-hydrochloric acid activate?

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
March 10, 2011

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: