DETERMINATION OF THE CORROSION RATE OF STEEL REINFORCEMENT BY GALVANIC TESTING

Galvanic laboratory experiments are frequently used to predict the instantaneous corrosion rate of steel reinforcement. Based upon electrochemical theory a relationship between galvanic current and actual corrosion rate is derived. To validate this expected relationship laboratory experiments were conducted in carbonated concrete in which actively corroding steel was galvanically coupled to passivated steel. From the test results obtained the corrosion rates were calculated, which are in good agreement with the corrosion rates obtained from tests using the linear polarisation resistance technique. For practical purposes the galvanic polarisation method may give a reasonable alternative to the R(sub p)-method. Moreover, galvanic testing may provide more practical information concerning the susceptibility for galvanic corrosion and the electrical resistance of concrete. (A) For the covering abstract see IRRD 867793.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 247-57

Subject/Index Terms

Filing Info

  • Accession Number: 00675064
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 1-85075-723-2
  • Files: ITRD
  • Created Date: Mar 28 1995 12:00AM