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

-----

Metal Pretreatment

What is the life span of Ammonium Bifluoride in a metal parts washer application? What would the concentration need to be for this application to completely degrease and etch zinc cast parts?

Virgil Bryson
- Dalton, Georgia, USA
2002

Hi Virgil,

Ammonium bifluoride has no degreasing ability. It is included as a component in proprietary metal pretreatment products to do the etching job that you mentioned. But other components in the formulation will do the cleaning.

It is difficult to give a minimum concentration of fluoride because the etch rate is dependent on several factors. Your best bet is to contact a chemical pretreatment vendor, who can recommend an appropriate formulated product.

George Gorecki
- Naperville, Illinois
2002

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: