Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing 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.
- Naperville, Illinois
2002
(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
Q, A, or Comment on THIS thread -or- Start a NEW Thread