Patents by Inventor Katsunobu SASAKI

Katsunobu SASAKI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220099557
    Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes 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, 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, to bring corrosion of the coated metal material to progress. The water-containing material has a viscosity at 65° C. of 10 mPa·s or more to 40 mPa·s or less.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 31, 2022
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
  • Publication number: 20220099556
    Abstract: A corrosion resistance test method for a coated metal material that includes a metal base and a surface treatment film, includes 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, 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, to bring corrosion of the coated metal material to progress. The water-containing material comprises water, an electrolyte material, and kaolinite, and comprises the kaolinite at 36.0 mass % or more to 45.0 mass % or less.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 31, 2022
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tatsuya EZAKI, Tsutomu SHIGENAGA, Akihide TAKAMI
  • Publication number: 20220034786
    Abstract: A corrosion resistance test apparatus is for a coated metal material including a metal base and a surface treatment film, and includes: one or two water-containing material holders to hold a water-containing material in contact with the surface treatment film inside; one or two electrodes in contact with the water-containing material; an external circuit configured to electrically connect between the electrode and the metal base, or between the electrodes; a temperature control element brought into contact with the coated metal material via an insulating portion and configured to control a temperature of at least the coated metal material; a temperature controller configured to control a temperature of the temperature control element; and a current supplier configured to supply a current between the electrode and the metal base, or between the electrodes, as an anode and a cathode, respectively to bring corrosion of the coated metal material to progress.
    Type: Application
    Filed: July 13, 2021
    Publication date: February 3, 2022
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20210396650
    Abstract: An electrode portion device is for use in a corrosion resistance test for a coated metal material that includes a metal base and a surface treatment film on the metal base material. The electrode portion device includes: a container body that is tubular and disposed on the surface treatment film, and configured to hold a water-containing material that is in contact with the surface treatment film inside; a lid for closing an upper opening of the container body; a through hole provided in an upper side wall of the container body; and an electrode in contact with the water-containing material contained inside the container body.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 23, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20210396649
    Abstract: Provided is a measurement method for measuring a size of a damaged portion in a coated metal material that includes a metal base and surface treatment film provided on the metal base, and reaching the metal base through the surface treatment film. The measurement method includes the steps of disposing a water-containing material to be in contact with the damaged portion and an electrode to be in contact with the water-containing material, and electrically connecting between the electrode and the metal base with an external circuit; applying, with the external circuit, a constant voltage between the electrode and the metal base, as a cathode and an anode, respectively, and measuring a current value flowing therebetween; and calculating a size of the damaged portion, based on the current value measured and a correlation between the current value and the size of the damaged portion, determined on an exploratory basis in advance.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 23, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20210395914
    Abstract: A damaged portion treatment method is for treating one or more damaged portions formed in a coated metal material that includes a metal base and a surface treatment film provided on the metal base, the one or more damaged portions reaching the metal base through the surface treatment film. The damaged portion treatment method includes the steps of: disposing a water-containing material to be in contact with one or two out of the damaged portions and one or two electrodes to be in contact with the water-containing material, and electrically connecting, with an external circuit, between the electrode and the metal base, or between the two electrodes; and supplying a current between the electrode and the metal base, or between the two electrodes while alternately switching a direction of the current flowing through the external circuit, with the external circuit.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 23, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20210396648
    Abstract: Provided is a measurement method for measuring a size of expansion of a surface treatment film occurred in a coated metal material that includes a metal base and the surface treatment film provided on the metal base. The measurement method includes the steps of disposing a water-containing material to be in contact with the expansion and an electrode to be in contact with the water-containing material, and electrically connecting between the electrode and the metal base with an external circuit; applying, with the external circuit, a constant voltage between the electrode and the metal base, as a cathode and an anode, respectively, and measuring a current value flowing therebetween; and calculating a size of the expansion, based on the current value measured and a correlation between the current value and the size of the expansion, the correlation being determined on an exploratory basis in advance.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 23, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20210325295
    Abstract: An anticorrosion test method for a coated metallic material may include: a preparation step of adding an artificial flaw at two positions of the coated metallic material; a first measurement step of measuring a size of the artificial flaw; a connection step of electrically connecting the artificial flaws at the two positions by an external circuit via water-containing materials; an energization step of energizing a steel sheet to produce a bulge of an electrodeposition coating film; a second measurement step of measuring size of the bulge of the electrodeposition coating film; a calculation step of calculating a degree of progress of corrosion of the coated metallic material; and a correction step of correcting the degree of the progress of the corrosion.
    Type: Application
    Filed: March 12, 2021
    Publication date: October 21, 2021
    Applicant: Mazda Motor Corporation
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA
  • Publication number: 20200232905
    Abstract: A corrosion resistance tester for a coated metal material including a surface treatment film on a metal substrate includes: a container placed on the surface treatment film, and having a bottom surface in contact with the surface treatment film, the container including a plurality of water-containing electrolyte material holders that open through the bottom surface; the water-containing electrolyte material contained in each of the water-containing electrolyte material holders of the container, and being in contact with an associated one of a plurality of separate measurement target portions of the surface treatment film; a plurality of electrodes being each in contact with the water-containing electrolyte material contained in an associated one of the water-containing electrolyte material holders; an external circuit connecting the electrodes together; and a conduction means configured to conduct electricity to the metal substrate through the electrodes and the external circuit.
    Type: Application
    Filed: December 30, 2019
    Publication date: July 23, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Teruaki ASADA, Katsunobu SASAKI, Tsutomu SHIGENAGA