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

-----

Surface prep. for 446 S.S. prior to platinum plating

We currently platinum electroplate 446 stainless steel using an ammoniacal process. Prior to plating, the parts are degreased and washed using ultrasonic cleaners, then the surface to be plated is grit blasted and triple rinsed with DI water. We have attempted to moved to an acid etching (mixture of nitric, phosphoric and hydrofluoric acids) step prior to plating for better process control, but are now having with adhesion of the plating. Can anyone suggest a chemical process for preparing the surface prior to plating that won't cause difficulties with adhesion?

Andrew Dummer
R&D Physicist - RTP, North Carolina
2003

Try a Woods Nickel strike before plating. It is a simple plating bath to make. If you can't have a thin layer of nickel plating under the platinum I have had good success and adhesion plating 400 SS alloys by blasting, 5 min. alkaline anodic electroclean , 5 min. muriatic acid pickle 1 min. alkaline anodic electro clean and then plate.

Todd Osmolski
- Charlotte, North Carolina, USA
2003

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: