Brief Project Description: Prior to the use of weathering steel (non-painted) all steel beam, girder and truss bridges were painted to provide corrosion protection. Hot dip galvanizing is another option available but has limitations on the size of the piece to be galvanized. Metalizing is similar in composition to galvanizing as zinc is the primary component, however, the application of the metalizing to the steel is quite different in that it is spayed on using high temperature and pressure. Most all metalizing is currently performed in the shop. Vermont has many steel structures with failing paint systems but the steel is in good condition. Metalizing has a service life of 2 to 2.5 times that of a paint system. This project is to determine the cost effectiveness of field metalizing.
Poster: [Click to enlarge]
Presenters: J.B. McCarthy, VTrans Structures Design
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