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A-1 APPENDIX A TCRP D-7 TRANSIT COOPERATIVE RESEARCH PROGRAM RAIL BASE CORROSION STUDY QUESTIONNAIRE 1. TRANSIT AUTHORITY Date: Transit Authority: Name: Title: Address: Telephone: Fax: Email: If selected, are you willing to participate for a site visit? If so, please indicate your most convenient date between the proposed dates. February 6 â 10, 2006. Specific date ______________________________ February 11 â 17, 2006. Specific date ______________________________ Other, Indicate ____________________________________________________
A-2 1. TRACK & OPERATING DATA Do you have rails with corrosion at the base available for this study? Are you willing to provide and ship them to TTC for the present research investigation? If so, how many pieces/sections? Rail: Size, geometry, manufacturer (including chemistry and heat treatment (if available)): Likely location of corrosion occurrence: At the tie High rail Low Rail At the tunnels On the curves Tangent sections Joints Distance from the tie _____________________________ Other (please specify) ________________________________________________________ What is the severity of the problem based on previous analysis of failure, statistics, laboratory analysis, field results, numerical simulations, etc. The submission of an attached or electronic copy of any of the previously mentioned studies would be beneficial for the present research. Occurrence of corrosion based on weather and environmental conditions particularly where failures due to corrosion have been reported:
A-3 Approximate Number and Type of reported corrosion locations within the track/month/year: Maintenance & Operations: Wheel Load: Data of Strain history (i.e., S-N curves): Corrosion Rate and History: Type of Tie: Traffic Density (Annual MGT): Maximum Operating Speed: Third Rail/Overhead Catenary: Rail Defect Detection Frequency: Track Ownership: Maintenance Responsibility: Light Rail/Heavy Rail Transit: Electric Current (Intensity) and Type Passing through the Rail(s): Joint Use:
A-4 3. RAIL BASE CORROSION â CONDITIONS AND DESCRIPTION Description of current corrosion occurrence and the possible factor(s) that contribute to corrosion at the base of the rail including details such as type of fastenings and anchors and their effect on corrosion; effect of any kind of welded/bolted sections or devices to the rail, rail base surface preparation, any record of corrosion in regions that were preheat/post heat treated after welding or any other reasons, allowable temperature range (ambient/rail), characteristics of the corroded affected zone, inspection and quality control requirements:
A-5 4. RAIL BASE CORROSION â PROBLEMS & SAFETY CONCERNS Description of rail base corrosion problems and safety concerns. If rail failures have occurred include information as to the location, position, type and number for both detected internal defects and broken rail: Note: Please provide information as to the availability of rail failure samples that may be used for metallurgical analysis and/or previous analysis (provide photographs if available).
A-6 5. ALTERNATIVE RAIL BASE CORROSION PREVENTION Description of alternative procedures now in use to detect/prevent corrosion particularly at the base of the rail, together with any problems and safety concerns. Details including corrosion type and size, position on rail, rail surface (at the base) conditions and any mechanical damage of the rail, allowable temperature range, inspection and quality control requirements (provide photographs if available): 6. ADDITIONAL COMMENTS
