With reference to "potential contour mapping" of reinforced concrete structures other than bridges, the discussor suggests that it might be desirable to apply different potential criteria for structures in different environments. The potential of steel in sound concrete has been found to vary between wide limits in different environments. Even on sound structures potential scanning indicates considerable potential differences and therefore anodic and cathodic areas. It remains to be explained why such elements are formed in sound concrete. What is the driving force and which reaction occurs at the anode? Do we have an incubation period, during which excess alkalinity is slowly consumed at local anodes and chloride ions migrate towards the anodes until we reach the breakdown conditions?

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  • Supplemental Notes:
    • The original article to which this discussion applies is Electrochemical Removal of Chlorides from Concrete Bridge Decks by J.E. Slater, D.R. Lankard, and P.J. Moreland, published in Materials Performance, V15, N11, 1976.
  • Corporate Authors:

    National Association of Corrosion Engineers

    P.O. Box 1499
    Houston, TX  United States  77001
  • Discussers:
    • Arup, H
  • Publication Date: 1977-11

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Subject/Index Terms

Filing Info

  • Accession Number: 00184974
  • Record Type: Publication
  • Source Agency: Materials Performance
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM