One of the active ingredients in Coca Cola is phosphoric acid. It has a pH of 2.8, (On a scale of 1 -14, with 1 being the most acidic, 7 being neutral, and 14 being very caustic). Pure phosphoric acid can eat through metal, and dissolve concrete, but it sure makes the coke taste good.
Rumors say that Coke distributors have used it over the years to clean the engines of their delivery trucks, and it also works to help scrub road grime from your windshield. We can’t actually advise using Coke as a substitute for regular detergents, however there are some interesting ideas people have put forward over the years:
TOILETS
Pour a can of Coca-Cola into the toilet bowl. Let the "real thing" sit for one hour, then flush clean. The citric acid in Coke removes stains from vitreous china. It should work equally well for sinks and bath tubs.
CAR BUMPER RUST
Rub the bumper with a crumpled-up piece of Reynolds Wrap aluminum foil dipped in Coca-Cola.
CLEAN CORROSION FROM BATTERY TERMINALS
Pour a can of Coca-Cola over the terminals to bubble away the corrosion. This is according to Heloise.
LOOSEN A RUSTY BOLT
Applying a cloth soaked in Coca-Cola to the rusted bolt for several minutes.
REMOVE GREAE FROM CLOTHES
Empty a can of Coke into a load of greasy clothes, add detergent, and run through a regular cycle. The Coca-Cola will help loosen grease stains.
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That’s true, Coke works in cleaning, but remember that we drink Coke very often…how is it reflects to our guts…I don’t want even to imagine.
I begin to reduce consuming Coke after your post Simon
But I agree that this magic liquid helps in cleaning the rusted iron stuff…