Posco

Posco Co., Ltd

Inktec Co., Inc.

Noroo Coil Coatings Co., Ltd.

Yon-Kyun Song

Jung-Hwan Lee

Jin-Tae Kim

Kyoung-Pil Ko

Ha-Na Choi

Jong-Sang Kim

Sang-Heon Kim

Hyeon-Seok Hwang

Suk-Kyu Lee

Kwang-Tai Min

Rho-Bum Park

Yeon-Ho Kim

Ji-Hoon Park

Hoon Yun

Seok-Chan Choe

Jae-Dong Cho

Young-Jin Kwak

Tae-Yeob Kim

Ki-Cheol Kang

Bong-Hwan Yoo

Young-Ha Kim

Sun-Ho Jeon

Chang-Hoon Choi

Il-Jeong Park

Joong-Chul Park

Kyoung-Bo Kim

Chang-Sik Choi

Yong-Gyun Jung

Yong-Woon Kim

Joong-Kyu Kim

Yang-Ho Choi

Myoung-Hee Choi

Bong-Woo Ha

Yung-Keun Kim

Gab-Yong Kim

Kyung-Pyo Yu

Yun-Ha Yoo

Hyun-Ju Jeong

Yeong-Woo Jeon

Woon-Jong Kim

Kanghwan Ahn

Chan-Hee Park

Jeong-Hee Lee

Yun Ha Yoo

Min Hong Seo

Hyeon-seok Hwang

Jong-Kook Kim

Hyunju Jeong

A galvanized steel sheet according to one aspect of the present invention comprises: a base steel sheet; and a Zn—Al—Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn—Al—Mg-based plating layer may include a surface modified region enriched with cerium (Ce) on a surface layer side of the Zn—Al—Mg-based plating layer.

Surface modified galvanized steel sheet

Provided are a hot-dipped galvanized steel material and a method for manufacturing the same. The hot-dipped galvanized steel material comprises an iron substrate and a hot-dipped galvanizing layer formed on the iron substrate, wherein the hot-dipped galvanizing layer comprises, by wt %, 0.01 to 0.5% of Al, 0.01 to 1.5% of Mg, 0.05 to 1.5% of Mn, 0.1 to 6% of Fe, and the balance of Zn and inevitable impurities, with a Zn&#x2014;Fe&#x2014;Mn based alloy phase present at the interface between the iron substrate and the hot-dipped galvanizing layer, and an area ratio of the Zn&#x2014;Fe&#x2014;Mn-based alloy phase to the hot-dipped galvanizing layer ranging from 1 to 60%.

Hot-dip galvanized steel material having excellent weldability and press workability and manufacturing method therefor

Provided is an ink composition for an inkjet print steel plate, an inkjet print steel plate using the same, and a method for producing an inkjet print steel plate. The ink composition comprises: a linear acrylate-based oligomer; a reactive acrylate-based monomer; an ultraviolet curable initiator; at least one selected from the group consisting of a dye and a pigment; and at least one selected from the group consisting of an antioxidant, an antifoaming agent, and a dispersant.

Ink composition for inkjet printed steel plate, inkjet printed steel plate using the same, and method for producing inkjet printed steel plate

Provided is a surface-treated metallic material with easy control of glossiness and a manufacturing method therefor, the surface-treated metallic material comprising: a metallic material; and a coating layer which is formed on at least one side of the metallic material and on which an ultraviolet curable coating composition is cured, wherein the coating layer consists of a plurality of protrusions, which have a volume of 3 to 16 pico liters and are arranged at a density of 5 to 610 per 1 mmof the metallic material. As such, the surface-treated steel sheet is excellent in adhesion, scratch resistance and corrosion resistance, and has easy control of glossiness.

Surface-treated metallic material with easy control of glossiness and manufacturing method therefor

A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.

Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby

Provided are a zinc-base plated steel material comprising a base steel and a zinc-based plated layer and a post-treatment film, which are sequentially formed on the base steel. The post-treatment film comprises an oxide or oxide salt of at least one group A element selected from B, Al, V, and Fe and an organic compound, wherein the content of oxygen atoms in the post-treatment film is 50 atom % or more, and wherein when the mole number of oxygen atoms forming a covalent bond with hydrogen in the post-treatment film is a and the mole number of oxygen atoms not forming the covalent bond with hydrogen is b, a/b is 0.3 or greater; and a composition for forming the post-treatment film.

Zinc-based plated steel material having excellent sealer adhesion

Provided is a hot dip aluminized steel material including a base steel and a hot-dip Al&#x2014;Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt % to 20 wt % of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al&#x2014;Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.

Hot dip aluminized steel material having excellent corrosion resistance and workability, and manufacturing method therefor

Provided are a high manganese hot dip aluminum-plated steel sheet and a method for manufacturing the same, the steel sheet including: a base steel comprising, by wt %, 0.3-0.9% of C, 10-25% of Mn, 0.01-0.5% of Ti, 0.01-0.2% of Sn, 0.01-0.1% of Sb, and the balance of Fe and inevitable impurities; a hot dip aluminum-based steel plated layer formed on the base steel sheet and comprising 0.1 wt % or more of a sum of one or more types among Li, Na, and K, and the balance of Al and inevitable impurities; and an Al&#x2014;Fe&#x2014;Si&#x2014;Mn based alloy layer formed between the base steel sheet and the aluminum-based plated layer, and having a dual structure with different average Fe amounts.

High manganese hot dip aluminum-plated steel sheet having excellent sacrificial corrosion resistance and platability and manufacturing method therefor

Disclosed are a hot-rolled galvanized steel sheet having excellent galling resistance and formability, and a method for manufacturing the same. The hot-rolled galvanized steel sheet, includes: a base steel; and a hot-rolled galvanizing layer formed on the surface of the base steel, wherein the hot-rolled galvanizing layer provides a hot-rolled galvanized steel sheet having a Mn crystallite having a size of 10 &#x3bc;m or less between the resin dendrites of zinc that form sequins.

Hot-rolled galvanized steel sheet having excellent galling resistance, formability and sealer-adhesion property and method for manufacturing same

An ink composition for a printed steel sheet, having excellent adhesion to a steel sheet, processability, solvent resistance, and the like, a method for manufacturing a printed steel sheet using the same, and a printed steel sheet manufactured thereby, are provided. The ink composition for a steel material includes 10 to 30 parts by weight of a mixture of a urethane acrylate oligomer and another type of acrylate oligomer different from the urethane acrylate oligomer, 65 to 80 parts by weight of a radiation curable monomer which is a mixture of a monofunctional radiation curable monomer and a di- or more functional radiation curable monomer, 1 to 10 parts by weight of a photoinitiator, and 0.01 to 10 parts by weight of an adhesion promoter.

Ink composition for steel material, having excellent adhesion, method for manufacturing printed steel sheet by using same, and printed steel sheet manufactured thereby

A conversion coating composition comprising 0.01 wt % to 0.2 wt % of phosphorous (P); 0.01 wt % to 0.2 wt % of magnesium (Mg); 0.005 wt % to 0.15 wt % of zirconium (Zr); 0.005 wt % to 0.15 wt % of titanium (Ti); 0.005 wt % to 0.15 wt % of vanadium (V); 0.05 wt % to 1 wt % of phenol resin; the balance of water and other unavoidable impurities is provided. A surface treated steel sheet comprising a base steel sheet; a zinc or zinc alloy plated layer formed on the base steel sheet; a blackening layer formed on the zinc or zinc alloy plated layer; and an organic and inorganic complex conversion coating layer formed on the blackening layer, wherein the organic and inorganic complex conversion coating layer may satisfy the weight ratio of P:Mg:Zr:Ti:V=1:0.045 to 2:0.035 to 1.5:0.035 to 1.3:0.035 to 1.5 (based on the weight of P) is also provided. A method for manufacturing a steel sheet treated with the conversion coating composition is also provided.

Conversion coating composition, surface treated steel sheet, and method for manufacturing the same

Provided are a resin composition for surface treatment and a surface-treated steel sheet coated therewith. The resin composition for surface treatment includes a dispersing element having excellent thermal conductivity and heat dissipation, thereby maintaining physical properties of the conventional anti-fingerprint steel sheet, for example, high whiteness, fingerprint resistance, workability, electric conductivity and alkali resistance, and providing heat dissipation. In addition, the surface-treated steel sheet coated with the resin composition for surface treatment of the present invention has physical properties such as high heat dissipation, electric conductivity and whiteness, and thus may be replaced with a bottom chassis of a backlight unit, particularly, an edge-type backlight unit.

Resin composition for a surface treatment, and steel sheet coated with same

Growing community of inventors

Gwangyang-si, South Korea

Yon-Kyun Song