Patent ID: 11898995
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for evaluating a crack in a metal, the method comprising:
a first removal step of performing electrolytic treatment on a metal having an oxide scale layer formed on a surface thereof until a scale crack is generated in the oxide scale layer;
a second removal step of removing the oxide scale layer by performing the electrolytic treatment until the scale crack generated in the first removal step disappears; and
an evaluation step of measuring and evaluating a crack formed on a surface of a base material of the metal in which the scale crack has disappeared in the second removal step,
wherein the first removal step includes:
a step of performing the electrolytic treatment on the metal having oxide scale generated on the surface thereof;
a step of acquiring a first image by imaging the oxide scale; and
a step of determining whether or not the scale crack has been generated in the oxide scale on the basis of the first image by comparison of images, and
the second removal step includes:
a step of performing the electrolytic treatment on the metal in which the scale crack is generated;
a step of acquiring a second image by imaging the oxide scale; and
a step of determining whether or not the scale crack has disappeared on the basis of the second image by comparison of images.