Carbon content in steel and corrosion

[prime-factor]

I have two questions about carbon steel.

How does the carbon content of steel effect the rate of corrosion?

Apart from providing strength to the steel, how does carbon effect the properties of steel?

 

[Lok]

More C in steels means greater corrosion, as carbon is a catalyst.

As for the properties try this carbon-temperature table:
http://www.cryoking.co.in/site/img/FeC.gif
For understanding try to search all the different phases and see their properties.