what in coke effects copper and iron?

Answer 1

It really is the acid. If you know the activity series of metals, you could see why the iron would be affected, because it reacts with acid to make hydrogen and the iron salt of the acid. Copper, on the other hand, is below hydrogen on the series and shouldn't react with acids. The acid in question is phosphoric acid and can also function as an oxidizing agent (being itself reduced) to dissolve the copper to Cu^2+ ion.

Answer 2

Lancenigo di Villorba (TV), Italy

I start supponing that metalic surface of two bodies are brightened (grinding or other wear operations). Thus, you assicurate me that two metalic surface are "actives" versus external surroundings.
COKE, as common drink brownish coloured, are a very complex mixture of several organic compounds...obvious, all edibles!!! Remember, Coke is a very coloured liquid and it permit not direct observation. It is not a small peculiarity since this colour it permit not your direct observation of dipped metals.

Particurarly, I remember that Coke containts phosphoric acid who assign a low pH to this beverage.
The complex nature of Coke permits not me valuable previsions.
Concentrated aqueous solutions of phosphoric acid determine protective conditions for iron bodies, that is iron surface went "passivated" by means of someone phosphoric mixtures..is it your case? I don't know, thus iron's body belongs one case to proove in direct experimentations.
I think this effects concerns not copper bodies. On the other hand, copper surfaces are interested by acidic solutions only if the acid reactive is an oxidizer or it is a very aerated mixture (O2 like an oxidizer). This phenomena are called "oxygen-corrosion of copper" and my experience said me that its reaction's rate are slow. Easily, time's process belongs "week's period" (e.g. room's temperature). You could see a greenish slugs grew on the copper surface.

I hope this helps you.

Answer 3

i had heard that if you put a rusty penny in a glass of coke and let it sit for a couple of days, the acid in the coke would eat the rust off of the penny.

Answer 4

Do you mean coke as in the thing we drink (containing carbonic acid) or coke as in an impure form of carbon?

Answer 5

The Coke liquid is carbolic acid , or CO2 dissolved in water.

Answer 6

I dont know but I sure love Coke...when I dont feel good..makes my belly feel better.

how dangerous it is i cant beleive they let people drink it

Answer 7

it is the acid in the soda pop