EFFECT OF ALTERNATING CURRENT ON THE UNDERGROUND CORROSION OF STEELS

Results of tests involving imposition of 60 Hz AC at various densities in an oxygen concentration corrosion cell on DC between 2 electrodes are reported. AC imposed on DC increases the corrosion rate of steel in soil with high initial and then steady state attack following after a time interval. High densities increased attack rate and if sufficiently high, pitting. Corrosion products from AC-DC were friable. Temperature increases in the soil had negligible effect on corrosion rate. It is postulated that AC acts as a depolarizer and that reversible potential characteristics may be significant.

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  • Corporate Authors:

    National Association of Corrosion Engineers

    P.O. Box 1499
    Houston, TX  United States  77001
  • Authors:
    • Pookote, S R
    • Chin, David A.
  • Publication Date: 1978-3

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Filing Info

  • Accession Number: 00180379
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 12 1978 12:00AM