Effect of steel surface conditions on the macro-cell polarization behavior of reinforcing steel

摘要

The effect of steel surface conditions on the macro-cell polarization behavior of reinforcing steels embedded in cement mortar was investigated by comparing and analyzing the macro-cell current density and macro-cell polarization ratio of steels. The results indicated that steel surface conditions played an important role in controlling the macro-cell corrosion and polarization. The polished or pre-rusted surface had a better corrosion resistance to inhibit the flow of macro-cell current than the scaled surface that formed in the production process. Compared to the polished surface, the presence of mill scale or rust oxides on the surface of anodic steel could reduce the macro-cell polarization ratio of anode.