எலக்ட்ரோக்குறள்

1. ஏசி மாறுமே டிசியாய்  ஈசியாய்
   ரெக்டிபயர் வழி  செல்லின்
2. சென்டர்டேப் பிரிட்ஜ் புல்வேவ் வகையாம்
    ஹால்ப்வேவ் ரெக்டிபையர் மற்றொன்றாம்
3. ஃபில்டர் உள்செல்லும் பல்சேட்டிங் டிசி
    வெளி யாகும் யுனிடைரக்சனலாய்
4.  ஃபார்வர்டில் உள் செல்லும் கரண்ட்
     ரிவர்சில் டையோடால் தடுக்கப்படும்

Cola - Really a stain remover?

One day, when I was cleaning my motor bike, I was shocked in seeing rust on the rims of the bike. I rubbed it with water/oil soaked cloth. But, I couldn't remove it. Beyond my great laziness on such practices, was really worrying that I was not able to remove the rust.
One of my friends came and started suggesting me with his ideas. He strongly suggested me an incredible ideas to use coca-cola or Pepsi cola to remove rust. He added also that those sift drinks may be used to clean the toilets in removing stain.
It's really unbelievable. How could be, orally consumable food product, used to remove rust and stain? I asked him that why can't we use turbulent water fill flow at high pressure for this purpose, instead? He LOL and replied me that his idea is cheaper and easier than mine.
Is it so? What really makes cola to be used for this purpose? Can you please verify that which property of cola helps it for this purpose and substantiate my friend's statement?