Degradation by corrosion of steel rebars reinforced concrete structures. 2. Contributions to study of degradation mechanism of reinforced concrete structures for natural electrolytic media

The corrosion degradation of concrete steel structures and the repair costs of corrosion-caused damages have been analyzed. Also, the accelerating factors and the degradation mechanisms of underground steel rebars from reinforced concrete structures have been investigated. As the result of these studies the corrosion of steel rebars from reinforced concrete structures with large dimensions, frequently used in urban infrastructure constructions, is determined by the simultaneous action of hydrostatic pressure of groundwater, micromycetes and stray currents (in a.c. and d.c.).