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COATING FOR INSPECTION



Published January 12, 2009
COATING FOR INSPECTION
OF CRACKING IN STRUCTURE
Patent No. U.S. 7,341,777 B2
National Maritime Research Institute has been granted a patent for a coating for the inspection of a crack in a structure wherein a first coating layer having dispersed therein microcapsules with a visualizing liquid sealed therein is formed on the surface of the structure and when a crack is developed in the structure and propagated to the coating layer, the microcapsules dispersed in the coating layer are ruptured and the visualizing liquid flows out from the ruptured microcapsules and reaches the surface of the coating layer along the crack in the coating layer, making it possible to detect the occurrence of the crack in the structure, wherein at least one second coating layer not containing the microcapsules is formed over the first coating layer with the microcapsules dispersed therein, and the second coating layer being transparent and having an outermost layer capable of elongating at least seventeen times the amount of elongation of any other coating layer in the structure.



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