So far all ive found is it could be either Copper hydroxide or Patina...Please help...!
2006-10-19 16:21:03 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
malachite
2006-10-19 16:30:11 · answer #1 · answered by Brian S 3 · 0⤊ 2⤋
It is called Patina
Patina is a chemical compound formed on the surface of metal. Patinas form on metal from exposure to the elements. They are often deliberately added by artists and metalworkers. Patinas may be used to 'antique' objects, as a part of the design or decoration of art and furniture.
Patinas are restricted to exposed surfaces and can flake off. One reason bronze is so highly valued in statuary is that its patina protects it against further corrosion. This natural patina seldom shows a tendency to flake.
2006-10-19 16:25:28 · answer #2 · answered by Nuthouse 4456 5 · 2⤊ 0⤋
easily Hannah develop into somewhat appropriate. Pennies are oftentimes out of the climate and don't likely get uncovered to an excellent form of moisture acidic rain and so on. additionally, pennies are often dealt with and/or often jingling around in wallet so any corrosion formed has a tendency to positioned on away. in case you detect pennies that have been lost exterior for an prolonged time, like with a metallic detector, they're fairly greenish yet oftentimes darker eco-friendly the the statue of liberty.
2016-12-08 17:46:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Yes, the oxidation of metal to form a protective coating is called patina. However, the specific name for a copper patina is called "verdigris".
2006-10-19 16:30:14 · answer #4 · answered by Mmerobin 6 · 0⤊ 0⤋
The reddish, 'coppery' dark stuff is copper oxide, but the blue-green stuff you're thinking of is copper sulfide or copper sulfate (I forget which, but it's one of them.) This is caused by exposure to acid rain which contains dilute sulfuric or sulfurous acids due to emissions of sulfur oxide or dioxide gasses in the air with the rain.
2006-10-19 16:36:09 · answer #5 · answered by cdf-rom 7 · 0⤊ 0⤋
It's caused by a reaction the metal goes through after being exposed to moisture and the air.
2006-10-19 16:31:29 · answer #6 · answered by cafegrrrl 5 · 0⤊ 0⤋
it is copper "rust" to put it simply just as rust on steel is iron oxide, it is the oxygen reacting with the metal
2006-10-19 16:32:33 · answer #7 · answered by tk_tenn2 1 · 0⤊ 0⤋
Cu oxidation.
2006-10-19 17:07:12 · answer #8 · answered by Shaman 3 · 0⤊ 0⤋
the stuff on the statue of liberty is just oxidated copper.that is what the statue is made of.
2006-10-19 16:29:43 · answer #9 · answered by bigwormcustoms 2 · 0⤊ 1⤋
how about cuprous-oxide - - i.e. oxidated copper
2006-10-19 16:34:11 · answer #10 · answered by Anonymous · 0⤊ 0⤋
CuO
Th
2006-10-19 19:15:24 · answer #11 · answered by Thermo 6 · 0⤊ 0⤋