US 11,860,081 B2
Corrosion resistance test method for coated metal material and water-containing material for use therein
Teruaki Asada, Hiroshima (JP); Katsunobu Sasaki, Hiroshima (JP); Tatsuya Ezaki, Hiroshima (JP); Tsutomu Shigenaga, Hiroshima (JP); and Akihide Takami, Hiroshima (JP)
Assigned to MAZDA MOTOR CORPORATION, Hiroshima (JP)
Filed by MAZDA MOTOR CORPORATION, Hiroshima (JP)
Filed on Sep. 21, 2021, as Appl. No. 17/480,252.
Claims priority of application No. 2020-164068 (JP), filed on Sep. 29, 2020.
Prior Publication US 2022/0099556 A1, Mar. 31, 2022
Int. Cl. G01N 17/02 (2006.01); G01N 17/00 (2006.01)
CPC G01N 17/006 (2013.01) [G01N 17/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film provided on the metal base, the method comprising the steps of:
disposing one or more water-containing material holders each holding a water-containing material to be in contact with the surface treatment film and one or more electrodes to be in contact with the water-containing material contained in the one water-containing material holder or in each of the water-containing material holders, and electrically connecting, with an external circuit, between the one electrode and the metal base, or between the electrodes; and
supplying a current between the one electrode and the metal base, or between at least one of the electrodes and at least one of the other electrodes, as an anode and a cathode, respectively from a current supplier provided on the external circuit to bring corrosion of the coated metal material to progress, wherein
the water-containing material comprises water, an electrolyte material, and kaolinite, and
the content of the kaolinite in the water-containing material is 38.8 mass % or more to 44.3 mass % or less.