Concrete neutralization (also named as carbonation of concrete) and salt factors are liable to rust the rebars which leads to the swelling of the concrete and causes the peeling of the concrete. It is becoming the visible risk of construction safety. Galvanized rebar is rising as a solution to replace the black rebars. Many experiments show that the binding force between the concrete and galvanized rebar is the same as that with the black rebar, during the long term usage, galvanized rebar has the tendency to our-perform the black rebar.