Patents by Inventor Yong-Hwa Jung

Yong-Hwa Jung 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).

  • Patent number: 9296903
    Abstract: Provided is a film formation composition for improving the blackening of the surface of a steel sheet, particularly, the surface of a steel sheet containing Mg on the surface thereof, such as a Mg sheet, a plated steel sheet having a plated layer comprising Mg, and the like, a steel sheet comprising a film formed by the composition, and a method for forming the film. Provided are a film formation composition for preventing the blackening of the surface of the steel sheet, comprising: 2.5-7.5 parts by weight of a water-soluble phenoxy resin; 0.1-0.5 parts by weight of a fluorometal acid; 0.1-0.5 parts by weight of a metal compound; and 1-5 parts by weight of a cross-linking agent.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: March 29, 2016
    Assignees: POSCO, NOROO COIL COATINGS CO., LTD.
    Inventors: Young-Jin Kwak, Dong-Yun Kim, Woo-Sung Jung, Kyung-Hoon Nam, Dong-Yoeul Lee, Seok-Jun Hong, Tae-Yeob Kim, Yong-Hwa Jung, Mun-Jong Eom, Myoung-Hee Choi, Gab-Yong Kim, Sang-Hoon Park, Sang-Cheol Lee, Yang-Woo Nam
  • Patent number: 9267203
    Abstract: Provided is a continuous coating apparatus which can supply a liquid coating material (a molten metal) to a levitation-heating space through various paths, and can easily control a supply flow rate of the liquid coating material, and has a simplified structure. The continuous coating apparatus includes: a vacuum chamber unit through which a coating target passes; a levitation-heating unit disposed in the vacuum chamber unit and generating an evaporation vapor by vaporizing a supplied coating material; and a liquid coating material supply unit connected so that a liquid coating material is supplied to at least one of an upper portion and a lower portion of the levitation-heating unit, and communicating with the outside of the vacuum chamber unit.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: February 23, 2016
    Assignee: POSCO
    Inventors: Kyung-Hoon Nam, Young-Jin Kwak, Dong-Yoeul Lee, Tae-Yeob Kim, Yong-Hwa Jung, Kyoung-Bo Kim, Woo-Sung Jung, Mun-Jong Eom, Sang-Cheol Lee, Sang-Hoon Park
  • Publication number: 20150352812
    Abstract: Provided are a Zn—Mg alloy plated steel sheet and a method for manufacturing same. The Zn—Mg alloy plated steel sheet comprises a base steel sheet and a Zn—Mg plating layer formed on the base steel sheet, wherein the content of Mg in the Zn—Mg plating layer is 8 weight % or less (provided that 0 weight % is excluded), and the Zn—Mg plating layer is a compound phase of Zn and Mg2Zn11. According to the present invention, provided are a Zn—Mg alloy plated steel sheet and a method for manufacturing the same, wherein the Zn—Mg alloy plated steel sheet has excellent corrosion resistance, high adhesion, and superior surface quality of metallic luster.
    Type: Application
    Filed: December 28, 2012
    Publication date: December 10, 2015
    Applicant: POSCO
    Inventors: Woo-Sung JUNG, Seok-Jun HONG, Kyung-Hoon NAM, Dong-Yoeul LEE, Yong-Hwa JUNG, Young-Jin KWAK, Mun-Jong EOM, Tae-Yeob KIM
  • Publication number: 20150345008
    Abstract: Provided are a heating apparatus configured to generate a coating vapor for coating a base metal (steel sheet) which is continuously transferred in a vacuum state, and a coating device including the heating apparatus. A coating material to be converted into a coating vapor is initially supplied in a solid phase (solid state) and then phase changed into a liquid (liquid state). Thereafter, the liquid-state coating material is supplied to a heating unit, thereby preventing problems such as equipment erosion occurring when a liquid coating material is directly supplied and preventing the decrease of the temperature of a coating material when a solid wire is supplied as a coating material. As a result, the energy efficiency of the heating apparatus may be maximized.
    Type: Application
    Filed: December 19, 2013
    Publication date: December 3, 2015
    Inventors: Yong-Hwa JUNG, Kyung-Hoon NAM, Mun-Jong EOM, Woo-Sung JUNG, Seok-Jun HONG, Young-Jin KWAK, Tae-Yeob KIM, Dong-Yoeul LEE
  • Publication number: 20150329972
    Abstract: A phosphate solution for a zinc or zinc-based alloy plated steel sheet, and a zinc or zinc-based alloy plated steel sheet using the same are provided. The phosphate solution for a zinc or zinc-based alloy plated steel sheet contains a molybdenum (Mo) ion, a calcium (Ca) ion and a phosphate ion. A zinc or zinc-based alloy plated steel sheet includes a base steel sheet, a zinc-based or zinc alloy-based plating layer formed on the base steel sheet, and a phosphate film formed on the zinc-based or zinc alloy-based plating layer. The phosphate film contains a molybdenum compound, Ca and a phosphate. A pitting phenomenon occurring at the time of treating a steel sheet with a phosphate is prevented, and excellent corrosion resistance is exhibited on a phosphate film.
    Type: Application
    Filed: December 28, 2012
    Publication date: November 19, 2015
    Applicant: POSCO
    Inventors: Young-Jin KWAK, Kyung-Hoon NAM, Yong-Hwa JUNG, Tae-Yeob KIM, Dong-Yoeul LEE, Seok-Won CHO, Young-Ra LEE, Mun-Jong EOM, Woo-Sung JUNG, Seok-Jun HONG, Jae-Kyu MIN, Hong-Kyun SOHN
  • Publication number: 20150030875
    Abstract: The present invention relates to a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent coating adhesion and to a method for manufacturing same. Provided are a Zn—Mg alloy-coated steel sheet with excellent blackening resistance and excellent adhesion and a method for manufacturing same, the steel sheet comprising: a substrate steel sheet; a Zn—Fe intermetallic compound layer formed on the substrate steel sheet; a first Zn—Mg coating layer formed on the Zn—Fe intermetallic compound layer and comprising a Zn—Fe intermetallic compound in which the content of Zn is 95% by weight or higher; a second Zn—Mg coating layer formed on the first Zn—Mg coating layer and comprising a Zn—Mg intermetallic compound in which the content of Zn is 80 to 95% by weight; and an oxide film formed on the second Zn—Mg coating layer and comprising a metallic oxide.
    Type: Application
    Filed: December 27, 2012
    Publication date: January 29, 2015
    Inventors: Dong-Yoeul Lee, Kyung-Hoon Nam, yong-Hwa Jung, Seok-Jun Hong, Tae-Yeob Kim, Young-Jin Kwak, Mun-Jong Eom, Woo-Sung Jung
  • Patent number: 8926756
    Abstract: A passing apparatus includes: upper and lower sealing rolls dealing with variations in a thickness of a proceeding strip, the upper and lower sealing rolls allowing the strip to pass; and a strip sealing unit dealing with variations in a width of the proceeding strip, the strip sealing unit cooperating with the upper and lower sealing rolls to seal the proceeding strip passing through a chamber in a state in which the strip sealing unit surrounds the proceeding strip.
    Type: Grant
    Filed: December 24, 2010
    Date of Patent: January 6, 2015
    Assignee: Posco
    Inventors: Dong-Yoeul Lee, Mun-Jong Eom, Kyoung-Bo Kim, Yong-Hwa Jung, Woo-Sung Jung, Young-Jin Kwak, Tae-Yeob Kim, Kyung-Hoon Nam, Sang-Cheol Lee, Sang-Hoon Park, Yang-Woo Nam
  • Publication number: 20140011048
    Abstract: Provided is a film formation composition for improving the blackening of the surface of a steel sheet, particularly, the surface of a steel sheet containing Mg on the surface thereof, such as a Mg sheet, a plated steel sheet having a plated layer comprising Mg, and the like, a steel sheet comprising a film formed by the composition, and a method for forming the film. Provided are a film formation composition for preventing the blackening of the surface of the steel sheet, comprising: 2.5-7.5 parts by weight of a water-soluble phenoxy resin; 0.1-0.5 parts by weight of a fluorometal acid; 0.1-0.5 parts by weight of a metal compound; and 1-5 parts by weight of a cross-linking agent.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 9, 2014
    Applicants: NOROO COIL COATINGS CO., LTD., POSCO
    Inventors: Young-Jin Kwak, Dong-Yun Kim, Woo-Sung Jung, Kyung-Hoon Nam, Dong-Yoeul Lee, Seok-Jun Hong, Tae-Yeob Kim, Yong-Hwa Jung, Mun-Jong Eom, Myoung-Hee Choi, Gab-Yong Kim, Sang-Hoon Park, Sang-Cheol Lee, Yang-Woo Nam
  • Publication number: 20130199447
    Abstract: Provided is a continuous coating apparatus which can supply a liquid coating material (a molten metal) to a levitation-heating space through various paths, and can easily control a supply flow rate of the liquid coating material, and has a simplified structure. The continuous coating apparatus includes: a vacuum chamber unit through which a coating target passes; a levitation-heating unit disposed in the vacuum chamber unit and generating an evaporation vapor by vaporizing a supplied coating material; and a liquid coating material supply unit connected so that a liquid coating material is supplied to at least one of an upper portion and a lower portion of the levitation-heating unit, and communicating with the outside of the vacuum chamber unit.
    Type: Application
    Filed: December 13, 2010
    Publication date: August 8, 2013
    Applicant: POSCO
    Inventors: Kyung-Hoon Nam, Young-Jin Kwak, Dong-Yoeul Lee, Tae-Yeob Kim, Yong-Hwa Jung, Kyoung-Bo Kim, Woo-Sung Jung, Mun-Jong Eom, Sang-Cheol Lee, Sang-Hoon Park
  • Publication number: 20130186339
    Abstract: Provided is a dry coating apparatus for coating a coating material, i.e., deposition vapor (metal vapor) on a substrate (a steel strip). The dry coating apparatus includes a coating part disposed in a vacuum to coat deposition vapor generated through heating and evaporation of a supplied coating material onto a proceeding object to be coated and a heating source disposed in an atmosphere to heat and levitate the coating material in the coating part.
    Type: Application
    Filed: December 26, 2011
    Publication date: July 25, 2013
    Applicant: POSCO
    Inventors: Kyung-Hoon Nam, Mun-Jong Eom, Young-Jin Kwak, Woo-Sung Jung, Tae-Yeob Kim, Dong-Yoeul Lee, Seok-Jun Hong, Kyoung-Bo Kim, Yong-Hwa Jung, Sang-Hoon Park, Sang-Cheol Lee, Yang-Woo Nam
  • Publication number: 20130186524
    Abstract: Provided is an aluminum (Al) plating layer/aluminum (Al)-magnesium (Mg) plating layer multi-layered structure alloy plated steel sheet having excellent plating adhesiveness and corrosion resistance, which is characterized in that the Al—Mg plating layer is formed on the Al plating layer. According to the present invention, corrosion resistance of an Al plated steel sheet is further improved by forming an Al—Mg alloy plating layer, and plating adhesiveness between plating layer and underlying steel sheet may be improved as well as excellent stability and practicality being realized.
    Type: Application
    Filed: December 20, 2011
    Publication date: July 25, 2013
    Applicant: POSCO
    Inventors: Young-Jin Kwak, Dong-Yoeul Lee, Yong-Hwa Jung, Woo-Sung Jung, Mun-Jong Eom, Kyoung-Bo Kim, Kyung-Hoon Nam, Tae-Yeob Kim, Sang-Cheol Lee, Sang-Hoon Park
  • Publication number: 20120273459
    Abstract: A passing apparatus includes: upper and lower sealing rolls dealing with variations in a thickness of a proceeding strip, the upper and lower sealing rolls allowing the strip to pass; and a strip sealing unit dealing with variations in a width of the proceeding strip, the strip sealing unit cooperating with the upper and lower sealing rolls to seal the proceeding strip passing through a chamber in a state in which the strip sealing unit surrounds the proceeding strip.
    Type: Application
    Filed: December 24, 2010
    Publication date: November 1, 2012
    Applicant: POSCO
    Inventors: Dong-Yoeul Lee, Mun-Jong Eom, Kyoung-Bo Kim, Yong-Hwa Jung, Woo-Sung Jung, Young-Jin Kwak, Tae-Yeob Kim, Kyung-Hoon Nam, Sang-Cheol Lee, Sang-Hoon Park, Yang-Woo Nam
  • Publication number: 20100285333
    Abstract: There is provided a zinc alloy coated steel sheet including a vacuum deposited layer capable of improving corrosion resistance and sealer adhesion that are suitable for the use in automobiles, and a process of manufacturing the same. The zinc alloy coated steel sheet includes a zinc coating layer formed on a steel sheet; and a zinc/metal alloy deposited layer formed on the zinc coating layer, wherein the zinc coating layer, and a metal diffusion layer is present in the zinc coating layer.
    Type: Application
    Filed: December 23, 2008
    Publication date: November 11, 2010
    Applicant: POSCO
    Inventors: Young-Jin Kwak, Dong-Yoeul Lee, Kyung-Hoon Nam, Sang-Cheol Lee, Yong-Hwa Jung, Woo-Sung Jung, Sang-Hoon Park, Tae-Yeob Kim, Gwang-Seok Kim