The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2018
Filed:
Dec. 28, 2012
Posco, Pohang-si, Gyeongsangbuk-do, KR;
Young-Jin Kwak, Gwangyang-si, KR;
Kyung-Hoon Nam, Gwangyang-si, KR;
Yong-Hwa Jung, Gwangyang-si, KR;
Tae-Yeob Kim, Gwangyang-si, KR;
Dong-Yoeul Lee, Gwangyang-si, KR;
Seok-Won Cho, Gwangyang-si, KR;
Young-Ra Lee, Gwangyang-si, KR;
Mun-Jong Eom, Gwangyang-si, KR;
Woo-Sung Jung, Gwangyang-si, KR;
Seok-Jun Hong, Gwangyang-si, KR;
Jae-Kyu Min, Pohang-si, KR;
Hong-Kyun Sohn, Pohang-si, KR;
POSCO, Pohang-si, Gyeongsangbuk-do, KR;
Abstract
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.