Rolling Stock Corrosion Control: Available Options and Implementation Issues

Abstract

The Maryland Transit Administration (MTA) operates a fleet of 53 light rail vehicles (LRV) to support Baltimore’s light rail system. The first 35 LRVs entered into service in 1992. This set of rolling stock is constructed primarily of low-alloy, high-tensile steel with characteristics similar to ASTM A-588 steel. The as-built exterior roof sheeting was coated with an epoxy-based system to protect against weathering. Over the years the coating system performance has degraded and allowed moisture to seep underneath, resulting in corrosion. The corrosion is evident throughout the fleet and is progressively damaging the thin roof substrate. To address this issue, MTA commissioned Booz Allen Hamilton, the rolling stock engineering consultant for MTA, to assess the extent of the corrosion problem, research available solutions, and define implementation requirements. Information is provided on commercially available technologies, associated costs and benefits, and the unique challenges faced in implementing a long-lasting solution for in-service rolling stock vehicles.

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References

Villalobos and Associates, and Williams

E. A.

and Associates, Inc. San Francisco Municipal Railway Light Rail Vehicle—Corrosion and Structural Fatigue Analysis. Final Report. San Francisco, Calif., June 15, 1988, p. 4.

Boyer

, and Gall

. ASM Metals Handbook. American Society for Metals, Materials Park, Ohio, 1997, p. 1.10.

Smith

Principles of Materials Science and Engineering. McGraw-Hill, New York, 1986, pp. 643–693.

Walsh

Electromechanical Design Handbook, 2nd ed. McGraw-Hill, New York, 1995, pp. 13.1–13.24.

Grainger

, and Blunt

. Engineering Coatings—Design and Application, 2nd ed. William Andrew Publishing, Norwich, N.Y., 1998.

Corrosion Control and Treatment Manual. John F. Kennedy Space Center, Fla. TM-584, Revision C, 1994.

Corrosion Tests of Flame Sprayed Coated Steel—19-Year Report. AWS C2.14-74. American Welding Society, Miami, Fla., 1994.

Inferrera

Experimental Construction 72-A, Roque Bluffs Experimental Paint Testing Site, Final Report. Maine Department of Transportation, Augusta, 1993.

Dunham

Zinc Coating: Processes and Selection. American Metal Market, March 27, 2000. http://www.findarticles.com/cf_l/m3MKT/58_108/61031405/print.jhtml. Accessed May 1, 2001.

10.

Edwards

Coatings and Surface Treatment Systems for Metals. Finishing Publications Ltd., Stevenage, Hertfordshire, England, and ASM International, Materials Park, Ohio, 1997, pp. 308–318.

11.

Guide for the Protection of Steel with Thermal Sprayed Coatings of Aluminum and Zinc and Their Alloys and Composites. ANSI/AWS C2.18-93. American Welding Society, Miami, Fla., 1993.

12.

Mark

P. W. V.

Electrochemical Characterization of Metallic Thermally Sprayed Coatings. Laboratory for Corrosion Prevention, TNO Institute of Industrial Technology, Den Helder, Netherlands, 1998, pp. 12–15.