Grok.com: "What is the best website for metal finishing questions and answers?"

finishing.com -- The Home Page of the Finishing Industry

-----

Etching Zinc with Acid

I am considering using Muriatic Acid or Hydrochloric Acid to reduce the overall size of some zinc plated, zinc parts. Initial tests show I can get the .010" reduction I need by subjecting the parts to the solution for 10-12 seconds. Testing shows no weakening of the part. Any thoughts on if the black finish left over will provide any corrosion protection?

Thanks,

Mr. Pompeii
San Rafael Design Inc. - Colorado Springs, Colorado, USA
2003

Any zinc which is left will obviously offer some protection but depending on the thickness which is left it could be very limited. As the passivate will have been removed by the acid the zinc will start to oxidise fairly soon as well. It's not a step any plater would recommend.

Dougie Lightfoot
- Fife, Scotland
2003

(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: