PIPE CORROSION AND PROTECTIVE COATINGS

Fifty-eight pipe culvert installations were sampled for durability characteristics; the samples were assigned a relative pipe rating value for the purpose of numerical analyses and correlation with corrosive environmental soil and water conditions. The independent variables used included chemical composition of the water and soil, pH, total soluble salt content minimum resistivity, resistivity at the naturally occurring soil moisture content, resistivity using the corrosponding field water, and age of the pipe. Results indicate the total soluble salts is a more significant factor than any single soluble salt content in predicting the performance of pipe material. All soil sites examined eventually reached a soluble salt content of 0.8 percent. The corrosive effects of the solubles peak at approximately the 5 percent level. The effects of pH and minimum resistivity are found to be higher at the lower soluble salt content (less than 1.5 percent), and both loss their dominance at higher salt concentrations. Minimum resistivity, in particular, loses its effect on pipe life expectancies at a solubles content greater than 1.5 or 2 percent. The criterion used to predict pipe performance correlates very well with field observations and varies only in areas beyond the limits of the selection criteria. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 20-24
  • Monograph Title: Bridge decks: corrosion, cathodic protection, and pavement seals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00156021
  • Record Type: Publication
  • ISBN: 030902577X
  • Files: TRIS, TRB
  • Created Date: Aug 4 1977 12:00AM