Posco

Posco Co., Ltd

Yang-Ho Choi

Jong-Sang Kim

Young-Jin Kwak

Tae-Yeob Kim

Yon-Kyun Song

Jung-Hwan Lee

Jin-Tae Kim

Bongwoo Ha

Kyoung-Pil Ko

Chang-Hoon Choi

Jin Tae Kim

Ha-Na Choi

Yeon-Ho Kim

Bong-Woo Ha

Jong Sang Kim

Jong-Kook Kim

Yeong-Seon Kim

A method of manufacturing a transparent pattern printed steel plate includes forming a printed paint film layer by jetting transparent ink onto at least one surface of a steel plate, and curing the printed paint film layer with ultraviolet light to form a cured printed paint film layer. Further, a method of manufacturing a transparent pattern printed steel plate includes preparing a steel plate having a color painted film layer formed on at least one surface thereof, forming a printed paint film layer by jetting transparent ink onto the color painted film layer, and curing the printed paint film layer to form a cured printed paint film layer.

Method for manufacturing transparent pattern print steel plate

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

A platelet-type zirconium phosphate, which has a P&#x2014;OH group contained in a structure thereof, and has a crystalline peak at a 2&#x3b8; value of 11.6&#xb1;2 degrees and no crystalline peak at a 2&#x3b8; value of less than 11.6&#xb1;2 degrees in X-ray diffraction analysis, is provided. The platelet-type zirconium phosphate has a platelet-type structure and can be uniformly dispersed at a nanoscale level in a coating film to exhibit excellent surface gloss and barrier capability. Also, the platelet-type zirconium phosphate can exhibit excellent corrosion resistance due to the presence of the P&#x2014;OH group on a surface thereof, and can be dispersed not only in an aqueous solution but also in an organic solvent.

Nanoplatelet-type zirconium phosphate and method for preparing same

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Gwangyang-si, South Korea

Yang-Ho Choi