CONDUCTIVE COATING, CONDUCTIVE COATING FILM, COATING FOR DETECTING CRACK AND COATING FILM FOR DETECTING CRACK

摘要

PROBLEM TO BE SOLVED: To provide a conductive coating having the optimum volume resistance ratio for detection of generation of a crack, easily performing a field execution and capable of accurately detecting generation of the crack, a conductive coating film, a coating for detecting a crack and a coating film for detecting a crack. SOLUTION: A crack progression detection coating film 3 is a coating film for detecting progression of the crack C3. The crack generation detection coating film 4 is the coating film for detecting generation of the crack C3and is formed by coating of the conductive coating. The conductive coating contains a silver powder and a silver-coated copper powder as conductive pigments and contains a urethane resin as an organic resin. A mixing ratio of the silver powder to the silver-coated copper powder is preferably 0.5 or more of the silver powder to 1 of the silver-coated copper powder at a weight ratio. A wiring coating film 5 is a coating film electrically connected to the crack generation detection coating film 4 and is formed by coating of the same conductive coating as the crack generation detection coating film 4. The wiring coating film 5 is formed, for example, in a band-like shape from a lower flange of a bridge to an upper flange along a web plate. COPYRIGHT: (C)2008,JPO&INPIT