Q. I am a Numismatic. India issued coins using the metal aluminium,
during the year 1980.
Now I find that my collection of aluminium coins are getting
oxidized even though they are kept in plastic pouches and coin
holders. Bulk of my aluminium coins are also packed in bags, which are
also oxidizing. How to preserve the coins of ALUMINIUM?
NAMA DWARAKANATH - MYSORE, India
June 20, 2012
A. Any aluminum surface gets oxidized in air. It is to be welcomed as the thin oxide layer protects it from further oxidation. In your case something else is likely to be happening in addition to oxidation. Make sure they are protected from moisture etc.
H.R. Prabhakara - Consultant Bangalore Plasmatek - Bangalore Karnataka India
finishing.com is made possible by ... this text gets replaced with bannerText
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: