THE INHIBITING ACTION OF DIFFERENT DOSAGES OF SODIUM NITRITE ON THE CORROSION OF REINFORCEMENT IN PRESTRESSED BEAMS USING THE RESISTANCE TO POLARIZATION AS A MEASUREMENT TECHNIQUES

ACCION INHIBIDORA DE DIVERSAS DOSIS DE NO2NA SOBRE LA CORROSION DE LAS ARMADURAS DE VIGUETAS PRETENSADAS UTILIZANDO LA RESISTENCIA DE POLARIZACION COMO TECHNICA DE MEDIDA.

Amongst the best known methods of protecting reinforcement in concrete against the aggressive action of chloride ions, NaN92 was tested as an inhibitor, in the proportions 1 - 1, 5 - 2 - 2, 5 and 3% with respect to the weight of cement, with 2% of calcium chloride. The test samples were small prestressed concrete beams 0.1 x 0.1 x 2M, made of p-350 and p-450 cement. The tests are planned for five years, and the study gives partial results obtained after ten months. The resistance to polarization is used as a non-destructive measurement of the rate of corrosion. All the dosages of NaN02 studied in the environmental test conditions (pressure and temperature constant) inhibit the corrosive action of the chloride ions on the steel of the reinforcement; the larger the dosage, the greater the inhibiting effect. The values of the resistance to polarization have A semi-quantitative validity, and it is necessary to conduct new tests which permit the linking of this index to loss of weight used as a measure of corrosion. /TRRL/

• Corporate Authors:

  Portavoz de la Agrupacion Nacional de Fabricantes

  Seccion Publicidad, Quinones 15-1
  Madrid 8,   Spain 
• Authors:
  • Andrade, C
• Publication Date: 1975-5

Language

• Spanish

Media Info

• Features: References; Tables;
• Pagination: p. 5-13
• Serial:
  • Alemas
  • Issue Number: 82

Subject/Index Terms

• TRT Terms: Beams; Calcium chloride; Corrosion; Corrosion resistance; Halides; Inhibitors (Chemistry); Material reinforcement; Nitrites; Polarization; Pressure; Prestressed concrete; Prestressing; Prevention; Reinforced concrete; Reinforcing steel; Sodium inorganic compounds; Steel; Temperature; Tests; Weather resistance
• Old TRIS Terms: Sodium nitrite
• ITRD Terms: 5252: Corrosion; 7314: Halide; 7137: Inhibitor; 6796: Polarization; 5412: Pressure; 4796: Prestressed concrete; 9149: Prevention; 3471: Reinforcement (in mater); 4542: Steel; 6722: Temperature; 6255: Test; 5940: Weather resistance
• Subject Areas: Geotechnology; Highways; Materials; Security and Emergencies; I34: Steels and Metals;

Filing Info

• Accession Number: 00163185
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 18 1978 12:00AM