ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,459,049, issued on Nov. 4, was assigned to POSCO Co. LTD (Pohang-si, South Korea).
"Method for welding a zinc coated steel sheet" was invented by Gyu-Yeol Bae (Incheon, South Korea) and Ho-Soo Kim (Incheon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for welding a zinc coated steel sheet is provided. The method for welding a zinc coated steel sheet of the present invention is a method for welding a zinc coated steel sheet by using a welding material, wherein when welding, the welding current is 150-300 A, a shielding gas is a mixed gas of Ar+10-30% CO2, and the welding polarity is alternately altered so that the welding polarity f...