A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Steel specimens in three different superficial states (machined, scaled, and pre-rusted) were embedded in concrete blocks (OPC) with various chloride contents (0.0, 0.4, and 2.5 wt.%/cement) and exposed to different levels of relative humidity (60-100%). Electrochemical methods for corrosion monitoring were applied for a period of 4 years. The concrete blocks were broken and mass changes of steel specimens were determined. The average corrosion rate of machined and scaled steel was lower than 1 my m/year in concrete with a low chloride content (<=0.4 wt.%). The pre-rusted steel in concrete even without any chloride content showed technically unacceptable average corrosion rate (>1 my m/year). For all steel specimens, corrosion was localized. The corrosion rate at these spots reached values up to 65 my m/year. Mass-loss data confirmed electrochemical results (polarization resistance), i.e. that the corrosion rate of pre-rusted steel reinforcement was unacceptable even in noncarbonated concrete without any chlorides present.
Steel specimens in three different superficial states (machined, scaled, and pre-rusted) were embedded in concrete blocks (OPC) with various chloride contents (0.0, 0.4, and 2.5 wt.%/cement) and exposed to different levels of relative humidity (60-100%). Electrochemical methods for corrosion monitoring were applied for a period of 4 years. The concrete blocks were broken and mass changes of steel specimens were determined. The average corrosion rate of machined and scaled steel was lower than 1 my m/year in concrete with a low chloride content (<=0.4 wt.%). The pre-rusted steel in concrete even without any chloride content showed technically unacceptable average corrosion rate (>1 my m/year). For all steel specimens, corrosion was localized. The corrosion rate at these spots reached values up to 65 my m/year. Mass-loss data confirmed electrochemical results (polarization resistance), i.e. that the corrosion rate of pre-rusted steel reinforcement was unacceptable even in noncarbonated concrete without any chlorides present.
Influence of pre-rusting on steel corrosion in concrete
Cement and Concrete Research ; 31 ; 589-593
2001
5 Seiten, 11 Quellen
Article (Journal)
English
Influence of pre-rusting on steel corrosion in concrete
| British Library Online Contents | 2001
Influence of pre-rusting on steel corrosion in concrete
| Online Contents | 2001
De-rusting of Steel in Concrete
| Engineering Index Backfile | 1929
Rusting of iron and steel in concrete
| Engineering Index Backfile | 1920
Rusting of steel rods in pumice and slag concrete
| Engineering Index Backfile | 1927