Posco

Rho-Bum Park

Jong-Sang Kim

Yon-Kyun Song

Kwang-Geun Chin

Jung-Hwan Lee

Kyoung-Pil Ko

Man-Young Park

Yeong-Sool Jin

Ji-Hoon Park

Hoon Yun

Seok-Chan Choe

Hyeong-Jun Huh

Hyun-Ju Jeong

Yeong-Seob Kueon

Jin-Gun Jang

Ki-Duck Park

Hong-Jong Yoo

Kook-Jin Han

Sang-Keol Noh

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 is a method for producing plated steel sheet by means of an annealing device which includes at least one section and in which the at least one section is filled with a gas constituting a non-reducing atmosphere or a weakly reducing atmosphere to substantially improve the quality of plating onto hot-dipped steel sheet, including the plating properties, alloying properties, anti-pickup properties, plating adhesion properties, anti-flaking properties, anti-cratering properties and anti-ash properties, by using prior-art annealing equipment and heat-treatment cycle without any additional oxidation-reduction heat treatment process or large quantities of high-cost alloying elements.

Production method for plated steel sheet using a steel sheet annealing device

There is provided a method and apparatus for plating high strength steel such as advanced high strength steel (AHSS) after irradiating the high strength steel with at least one of laser light and plasma to remove Si/Mn/Al oxides from the surface of the high strength steel, modify the surface of the high strength steel, or make the surface of the high strength steel suitable for a post process such as a zinc plating process. For this, a plating method includes heating high strength steel; treating a surface of the high strength steel with plasma to remove at least one of a Mn oxide, an Al oxide, and an Si oxide formed on the surface of the high strength steel during the heating of the high strength steel; and plating the surface-treated high strength steel.

Plating method

Growing community of inventors

Gwangyang-si, South Korea

Rho-Bum Park