How well does salt (salt water) clean a penny?

salt to clean a penny
Salt by itself does nothing but if mixed with water, the liquid can be applied to a penny to try to soak it for a while and then clean the penny. I’ve found that salt water does not do so well when trying to clean a penny. I could barely tell if it cleaned the penny at all, in fact.
Since the results of cleaning a penny with salt water are barely noticeable, I conclude that on a scale of 1 to 10 for 1 being the best product to use to clean a penny and 10 being the worst to clean a penny, I rate saltwater as a 9.
That’s not to say that over a long time salt may not clean a penny, but I think salt over time may even do more harm than good because it can cause oxidation and actually more quickly corrode than clean a penny (if mixed with oxygen from the air that is).
Can Saltwater Preserve a Shiny Penny and Clean It Over Time?
Salt is a preservative. But if a penny is in salt water versus on land next to salt water, that too may have different results. Consider lost treasure coins, versus the statue of liberty and how metals like copper corrode when sea salt air and the metal combine (as in the statue of liberty case, where it becomes green).
Submerged though, some metals seem to not corrode and are preserved and cleaned and therefore shiny like pennies in a wishing well…so even in non-salt-water for that matter. The oxygen is more of a problem then, than the water alone.

Pennies after cleaning with salt water
Will a copper penny not only preserve a shine but get shinier if it’s left in salt water? That would require a longer term experiment. Mine was a short term soak and rub with salt experiment (for a few minutes) and as you can see by my pictures, the results were negligible. The penny on the right was pretty much that shiny to begin with. I always start with a dirty and slightly shiny penny to see whether either get shinier. the dull penny stayed dull, the shiny penny got just a little shinier.
Next time I’ll try baking soda to clean a penny in the same way. Stay tuned to see what happens!
Posted in: How To Clean a Penny | Comments(0)