METHOD FOR DETECTING FLAW OF COATING FILM

摘要

PROBLEM TO BE SOLVED: To provide a method capable of certainly and rapidly detecting the flaw of the coating film on a conductive substrate. SOLUTION: In the method for detecting the flaw portion of the coating film formed on a conductive substrate, voltage larger than decomposition voltage is applied across the conductive substrate 12 immersed in an electrolyte 11 of a metal salt as a cathode terminal and an anode terminal 13 to electrolytically precipitate the metal in the electrolyte 11 and the electrolytically precipitated metal is electrodeposited on the flaw portion of the coating film on the conductive substrate 12 being the cathode terminal.