CHARACTERISATION OF BRIDGE LOCATIONS BY CORROSION AND ENVIRONMENTAL MEASUREMENTS-FIRST YEAR RESULTS

CLIMATOLOGICAL AND AIR POLLUTION FACTORS GREATLY AFFECT THE CORROSION DAMAGE TO STEEL HIGHWAY BRIDGES. THIS REPORT GIVES THE FIRST RESULTS OF A PROGRAM TO DEFINE QUANTITATIVE CRITERIA BY WHICH THE POTENTIAL CORROSIVITY OF A PROSPECTIVE BRIDGE LOCATION CAN BE ASSESSED. AT SEVEN SITES THROUGHOUT LOW ALLOY STEEL AND ZINC ARE BEING MEASURED UNDER BOTH OPEN AND SHELTERED EXPOSURE. METEOROLOGICAL AND AIR POLLUTION DATA ARE ALSO BEING COLLECTED. TO ELIMINATE THE CONSIDERABLE DELAYS WHICH OCCUR IN NEGOTIATING THE BUILDING OF PERMANENT TEST COMPOUNDS, A MOBILE TEST RIG HAS BEEN DEVELOPED, WHICH CAN BE EASILY TRANSPORTABLE TO ANY PROSPECTIVE BRIDGE LOCATION. FROM THE FIRST YEAR'S RESULTS, IT IS APPARENT THAT SHELTERED TEST SPECIMENS GIVE A MUCH CLOSER INDICATION OF THE CORROSIVITY UNDER A BRIDGE DECK THAN OPEN EXPOSURE SPECIMENS. OF THE ENVIRONMENTAL FACTORS, ATOMOSPHERIC CHLORIDES AND SULPHUR COMPOUNDS ARE THE MAJOR CAUSE OF VARIATIONS IN CORROSION RAT. /AUTHOR/

• Supplemental Notes:
  • Rept No LR550
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Hutchins, J S
  • MCKENZIE, M
• Publication Date: 1973

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 26 p.

Subject/Index Terms

• TRT Terms: Air pollution; Chlorides; Corrosion; Location; Measurement; Metal bridges; Steel bridges; Sulfur compounds; Testing; Weather
• Uncontrolled Terms: Corrosive environments
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217401
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: R&d Rpt
• Files: TRIS
• Created Date: Jul 31 1974 12:00AM