Title:
GAS LEAKAGE DETECTION METHOD
Document Type and Number:
Japanese Patent JP2020034479
Kind Code:
A
Abstract:
To provide a gas leakage detection method with which it is possible to specify the leakage point or leakage amount of a gas.SOLUTION: The present invention is a gas leakage detection method comprising: an application step for applying a hydrogen gas of higher pressure than on one surface side of a test object to other surface (1b) of the test object (1) in which a metal layer (21) that passes hydrogen is formed on one surface (1a) and a reaction layer (22) including silver halide is formed on one surface of the metal layer in order; a removal step for removing the reaction layer after the application step; and an observation step for observing the one surface side of the metal layer after the removal step. According to the present invention, it is possible to specify a leakage point or leakage amount from the presence or amount of silver on the one surface of the metal layer, even when the leakage of traces of a gas occurs locally. The metal layer is, for example, a palladium layer or a nickel layer. The reaction layer is, for example, a gelatin film including silver bromide. The removal step may be carried out after performing a development step for immersing the reaction layer in formalin after the application step.SELECTED DRAWING: Figure 1
More Like This:
| WO/1991/002958 | LEAKAGE DETECTION SYSTEM |
| WO/2002/029377 | LEAKAGE DETECTING DEVICE FOR SEALED PACKAGES |
Inventors:
KITAHARA MANABU
SAKAKURA NATSU
TAKEUCHI HISATO
SUGITA AYA
MITSUOKA TAKUYA
SAKAKURA NATSU
TAKEUCHI HISATO
SUGITA AYA
MITSUOKA TAKUYA
Application Number:
JP2018162702A
Publication Date:
March 05, 2020
Filing Date:
August 31, 2018
Export Citation:
Assignee:
TOYOTA CENTRAL RES & DEV
International Classes:
G01M3/26
Attorney, Agent or Firm:
Morioka Masayuki
Sansui International Patent Office
Sansui International Patent Office