Is Steel or Aluminum More Corrosion Resistant?
The carbon content is the main factor in determining how fast a metal will rust or corrode. Because of this, aluminum is much better at resisting corrosion than steel. Cold rolled steel is more corrosion resistant than hot rolled because cold rolling smooths the surface, refines the grain structure, and causes differences in the mechanical properties along and across the rolling direction. The smoother the surface finish, the higher the corrosion resistance.
