Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing 1989-2024
-----
How to Remove Zinc Phosphate from Frying Pan
Q. I am in the process of seasoning a cast iron pan. I overdid the removal of the old , organic coating making the surface too slick for proper adhesion of the seasoning (which will be baked on consumable oil). So I used some metal etch by POR15 [adv: Por-15 MetalPrep on eBay or Amazon [affil links] to solve that problem and results are good. However the bottle says a coating of zinc phosphate will be left behind. I washed the pan in soap and water, then baking soda soak and scrub before the metal etch dried. I read that zinc phosphate can decompose in water. Any other suggestions on how to be certain the zinc phosphate is removed, ideally without any more toxic chemicals?
Anthony Siciliano- Redding, Connecticut
January 18, 2024
A. Hi Anthony,
Zinc dissolves in mild acids, so I would scour it with vinegar.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
I have used muriatic acid to take the galvanized plating off before welding, so I'll try vinegar.
- Redding, Connecticut
January 19, 2024
Q, A, or Comment on THIS thread -or- Start a NEW Thread