ACCELERATED CORROSION TEST FOR METAL DRAINAGE PIPES. FINAL REPORT

This study represents an attempt to develop an accelerated test which would assist the highway engineer in evaluating the usefulness of a new type of coated steel culvert. The test method was to be short in duration (in the order of days), and the results must correlate with field results. The project chose to use electrochemical techniques to develop a laboratory method. The electrical potential of the culvert was raised above its natural potential, and it was placed in a corrosive solution containing hydrogen ions, chlorides, and sulfate ions. A total of six different types of culverts were used in the tests. The best accelerated test method developed was a 3-day high pressure oxygen test (500 psi oxygen) at ambient temperature. The coupon was placed inside a 316SS Baroid cell which elevated its potential. The percent zinc remaining on the coupon after testing was calculated using atomic absorption (AA), and was to be the basis of rating the coating. An alternative 3-day method involved the use of a potentiostat to maintain a 1-volt potential difference between two test coupons in a standard test solution. This method requires that the percent zinc on the coupons be determined from an area analysis. Both methods were able to produce results which correlated with field data.

• Record URL:
  http://www.ltrc.lsu.edu/pdf/2008/Report%20206.pdf
• 
• Supplemental Notes:
  • The University of Southwestern Louisiana is now the University of Louisiana, Lafayette.
• Corporate Authors:

  University of Louisiana, Lafayette

  Department of Chemical Engineering, P.O. Box 44130
  Lafayette, LA  United States  70504

  Louisiana Department of Transportation and Development

  1201 Capitol Access Road, P.O. Box 94245
  Baton Rouge, LA  United States  70804-9245

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Garber, J D
  • Lin, J H
• Publication Date: 1987-6

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 102 p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Coatings; Corrosion tests; Culverts; Electrochemistry; Metal pipe; Steel pipe; Structural materials; Zinc
• Old TRIS Terms: Atomic absorption; Culvert materials; High pressure oxygen test
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Hydraulics and Hydrology; Materials; I26: Water Run-off - Freeze-thaw; I34: Steels and Metals;

Filing Info

• Accession Number: 00469922
• Record Type: Publication
• Report/Paper Numbers: FHWA/LA-87/206, Res Rept 206
• Contract Numbers: 86-1P(B)
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jul 31 1988 12:00AM