On Feb 23, 10:04*pm, nestork wrote:
harry;3018804 Wrote:
Well as I am in the UK many of these products are not available
or have different names.
However we do (unfortunately) have Coca Cola.
I have heard it will remove rust. (Phosphoric acid,)
The problem with acid treatments is it can affect cutting edges,
especially on stuff like saws.
I don't know who said that Coca Cola contains phosphoric acid, but
that's not true. *If it were, Coca Cola would taste acidic all of the
time, but it doesn't. *In fact, it's easy to remove the acidic "bite"
from the taste of Coca Cola.
Coca Cola (and all carbonated soft drinks) contain an acid called
"carbonic acid". *They don't actually put carbonic acid in soft drinks.
They only put CO2 into the soft drink and the CO2 dissolves in the soft
drink and combines with H2O to form carbonic acid: * * CO2 + H2O =
CH2O3, which is carbonic acid.
[image:http://upload.wikimedia.org/wikipedi...rbonic-aci...]
Carbonic acid is an inherently unstable molecule and breaks down to form
CO2 and H2O fairly quickly, but as long as there's lots of CO2 dissolved
in water, carbonic acid will form as quickly as it breaks down, and that
water will remain acidic cuz of the carbonic acid in it.
It's the formation of carbonic acid from the CO2 dissolved in the water
that gives Coca Cola (and all carbonated soft drinks, and beer, and all
carbonated (aka: "sparkling") wines their acidic "bite" when you taste
them). *To prove that, just leave any carbonated soft drink sitting in a
glass over night to let all the CO2 come out of it. *Then when you taste
it, it'll just taste sweet like sugar water and not have any "bite" in
it's taste at all. *If there were acid in the soft drink to begin with
it, that acid wouldn't evaporate, and it would still taste acidic, like
vinegar left out in a glass over night.
It's the carbonic acid you swallow breaking down to form CO2 (gas) and
H2O in your stomach that makes you burp after drinking soft drinks, beer
or sparkling wine.
I kinda doubt that the amount of carbonic acid in a soft drink like Coke
would be sufficiently strong to dissolve rust, so I'd stick with
phosphoric acid which does work.
--
nestork
Bit here on the topic. Used as food/colas additive and as a rust
remover.
Apparently there are different sorts.
http://en.wikipedia.org/wiki/Phosphoric_acid#Uses
Another good reason not to drink Coca Cola.
Naval jelly and Coke are the same thing.
Also
http://frontview.wordpress.com/2012/...cid-cocaine-2/