Corrosion

Last two day ago.. I read about corrosion. Corrosion is about breaking down of essential properties in a material due to chemical reactions with its surroundings. In other word, corrosion well known as rust. Mostly it happen to steel . In the book says it produce oxides and salt of the original metals. there a lot of reaction that happen that i can't show it here. So for more information you may find it in internet. I want to share a little bit how to prevent from the corrosion . metals cannot withstand from rusted so they( the researcher) come out with idea to control it
1. coat the metal with paint
2. Electroplating is method to coat surfaces to prevent corrosion. Zn is one of the most popular method to prevent corrosion on steel. Ni/Cu is a common plating metals for corrosion protection.
3. Anodic protection also used to take advantage of the I-V curve of the protected parts to apply potential in the range of the passive current. However, this technique can be applied to few materials, such as Cr, Al, with precise control of the applied potential.