Posco

Posco Co., Ltd

Research Institute of Industrial Science & Technology

Noroo Coil Coatings Co., Ltd.

Young-Jin Kwak

Tae-Yeob Kim

Woo-Sung Jung

Yong-Hwa Jung

Kyung-Hoon Nam

Dong-Yoeul Lee

Mun-Jong Eom

Seok-Jun Hong

Sang-Hoon Park

Sang-Cheol Lee

Kyoung-Pil Ko

Kyoung-Bo Kim

Yang-Woo Nam

Myung-Soo Kim

Hyeon-Seok Hwang

Dong-Yun Kim

Noi-Ha Cho

Goo-Hwa Kim

Eel-Young Kim

Jung-Sik Lee

Jae-Young Lee

Jin-Gun Sohn

Yong-Min Kim

Myoung-Hee Choi

Soon-Joo Kwon

Jong-Sang Kim

Yon-Kyun Song

Jin-Tae Kim

Chang-Hoon Choi

Yang-Ho Choi

Yeon-Ho Kim

Gab-Yong Kim

Du-Youl Choi

Yong-Jin Cho

Hyeon-Soop Han

Seok-Won Cho

Young-Ra Lee

Jae-Kyu Min

Hong-Kyun Sohn

Gwang-Seok Kim

A zinc-based coated steel material includes: a base steel; and a multilayer zinc-based plating layer composed of two or more discriminated plating layers, wherein the multilayer zinc-based plating layer includes Mg at a ratio of 0.12 to 0.64 percent by weight to the entire multi-plating layer, and the multilayer zinc-based plating layer includes a first plating layer, a second plating layer, a third plating layer sequentially from an interface with the base steel, and the second plating layer is a Zn—Mg alloy layer including Mg of 0.4 to 0.9 percent by weight, and an adhesion amount of the second plating layer is 9 to 15 g/m.

Zinc-based coated steel material having excellent corrosion resistance and spot weldability

Provided is a plated steel plate used for interior materials and exterior materials such as home appliances, construction materials, vehicles, etc., and a method for manufacturing same. The plated sheet plate includes: base steel; a Zn—Mg plating layer formed on the base steel; and a UV-curable film layer formed on the Zn—Mg plating layer, wherein a hairline pattern is formed on a surface of the Zn—Mg plating layer, and the Zn—Mg plating layer includes 8 to 27 weight % of Mg and a balance of Zn and inevitable impurities.

Plated steel plate having excellent glossiness and surface property, and method for manufacturing same

Provided is a multilayer zinc alloy plated steel material comprising a base steel material and multiple plating layers formed on the base steel material, wherein each of the multiple plating layers includes one of a Zn plating layer, a Mg plating layer, and a Zn&#x2014;Mg alloy plating layer, and the ratio of the weight of Mg contained in the multiple plating layers to the total weight of the multiple plating layers is from 0.13 to 0.24.

Multi-layered zinc alloy plated steel having excellent spot weldability and corrosion resistance

Provided is a multilayered zinc alloy plated steel material comprising a base iron and multilayered plated layers formed on the base iron, wherein each of the multilayered plated layers is any one of a Zn-plated layer, a Mg-plated layer, and a Zn&#x2014;Mg alloy-plated layer, and the ratio of the weight of Mg contained in the multilayered plated layers is 0.13-0.24 on the basis of the total weight of the multilayered plated layers.

Multilayered zinc alloy plated steel material having excellent spot weldability and corrosion resistance

Provided are a single layer zinc alloy plated steel material and a fabrication method therefor, the single layer zinc alloy plated steel material comprising a base iron and a zinc alloy plating layer formed on the base iron, wherein the zinc alloy plating layer contains 13-24 wt % of Mg, and the adhesion amount of the zinc alloy plating layer is at most 40 g/m(excluding 0 g/m).

Single layer zinc alloy plated steel material exhibiting excellent spot weldability and corrosion resistance, and fabrication method therefor

Provided are a zinc alloy plated steel and a method for manufacturing same, the zinc alloy plated steel comprising: a base iron; a Zn plated layer formed on top of the base iron; and a Zn&#x2014;Mg alloy layer formed on top of the Zn plated layer and obtained through mutual diffusion of Zn and Mg, wherein the ratio of the weight of Mg contained in the Zn&#x2014;Mg alloy layer with respect to the total weight of the Zn plated layer and the Zn&#x2014;Mg alloy layer is 0.13 to 0.24, and the sum of the adhesion quantity of the Zn layer and the Zn&#x2014;Mg alloy layer is no more than 40 g/m(more than 0 g/m).

Zinc alloy plated steel having excellent weldability and corrosion resistance

The present invention relates to a plated steel sheet for hot press forming, a hot-press forming member manufactured using the same, and a manufacturing method thereof. The plated steel sheet comprises: a base steel sheet and a composite plated layer that is formed on at least one surface of the base steel sheet, and has a Mn-based plated layer and an Al-based plated layer alternately formed therein, an Al-based plated layer being formed on the uppermost layer thereof, wherein the composite plated layer has a total thickness of 5 to 30 &#x3bc;m, and in this case, the Mn-based plated layer accounts for 5 to 60% of the total thickness.

Plated steel sheet for hot press forming having excellent weldability and corrosion resistance, forming member, and manufacturing method thereof

The present invention provides a chromium-free coating composition having high blackening resistance and corrosion resistance, the composition comprising: 20 to 70 wt % of waterborne silane modified polyurethane; 0.5 to 5 wt % of a hardener; 0.5 to 5 wt % of a blackening inhibitor; 0.5 to 5 wt % of a corrosion inhibitor; and 0.5 to 5 wt % of a lubricant, with the balance being a solvent. The chromium-free coating composition has the effect of improving blackening resistance, corrosion resistance, alkali resistance, solvent resistance and fingerprint resistance of a steel sheet on which a coating layer comprising the composition is formed.

Chrome free coating composition having excellent blackening resistance and corrosion resistance, and surface-treated steel sheet

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.

Heating apparatus, and coating device comprising same

The present invention relates to a Zn&#x2014;Mg alloy-coated steel sheet with excellent blackening resistance and excellent coating adhesion and to a method for manufacturing same. Provided are a Zn&#x2014;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&#x2014;Fe intermetallic compound layer formed on the substrate steel sheet; a first Zn&#x2014;Mg coating layer formed on the Zn&#x2014;Fe intermetallic compound layer and comprising a Zn&#x2014;Fe intermetallic compound in which the content of Zn is 95% by weight or higher; a second Zn&#x2014;Mg coating layer formed on the first Zn&#x2014;Mg coating layer and comprising a Zn&#x2014;Mg intermetallic compound in which the content of Zn is 80 to 95% by weight; and an oxide film formed on the second Zn&#x2014;Mg coating layer and comprising a metallic oxide.

Zn&#x2014;Mg alloy-coated steel sheet with excellent blackening resistance and excellent adhesion

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.

Phosphate solution for zinc or zinc-based alloy plated steel sheet, and zinc or zinc-based alloy plated steel sheet using the same

Provided are a Zn&#x2014;Mg alloy plated steel sheet and a method for manufacturing same. The Zn&#x2014;Mg alloy plated steel sheet comprises a base steel sheet and a Zn&#x2014;Mg plating layer formed on the base steel sheet, wherein the content of Mg in the Zn&#x2014;Mg plating layer is 8 weight % or less (provided that 0 weight % is excluded), and the Zn&#x2014;Mg plating layer is a compound phase of Zn and Mg2Zn11. According to the present invention, provided are a Zn&#x2014;Mg alloy plated steel sheet and a method for manufacturing the same, wherein the Zn&#x2014;Mg alloy plated steel sheet has excellent corrosion resistance, high adhesion, and superior surface quality of metallic luster.

Zn&#x2014;Mg alloy plated steel sheet, and method for manufacturing same

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.

Dry coating apparatus

Growing community of inventors

Gwangyang-si, South Korea

Young-Jin Kwak