Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Stripping Chromate Conversion Coating From Zinc Die Casting

Hi peoples,

I wonder if anyone would have a suggestion for stripping chromate conversion coating from zinc die casting items. I know that you can strip chromate with a heated chromic acid solution, but it seems very aggressive for zinc parts. Any less aggressive alternatives?

Daniel Picard
Chef Chemist - Montreal, Quebecm, Canada
2007

2007

Hello Mr Pickard,

You can use any strong detergent to soak the parts in a while; or 5% NaOH solution in case you can wash it off quickly before the point that it attacks the base metal.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

(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

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: