Invention Application
US20150329972A1 PHOSPHATE SOLUTION FOR ZINC OR ZINC-BASED ALLOY PLATED STEEL SHEET, AND ZINC OR ZINC-BASED ALLOY PLATED STEEL SHEET USING THE SAME
有权
用于锌或锌基合金钢板的磷酸盐溶液，以及使用该锌合金的锌或锌基合金钢板
- Patent Title: PHOSPHATE SOLUTION FOR ZINC OR ZINC-BASED ALLOY PLATED STEEL SHEET, AND ZINC OR ZINC-BASED ALLOY PLATED STEEL SHEET USING THE SAME
- Patent Title (中): 用于锌或锌基合金钢板的磷酸盐溶液，以及使用该锌合金的锌或锌基合金钢板
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Application No.: US14758170Application Date: 2012-12-28
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Publication No.: US20150329972A1Publication Date: 2015-11-19
- Inventor: Young-Jin KWAK , Kyung-Hoon NAM , Yong-Hwa JUNG , Tae-Yeob KIM , Dong-Yoeul LEE , Seok-Won CHO , Young-Ra LEE , Mun-Jong EOM , Woo-Sung JUNG , Seok-Jun HONG , Jae-Kyu MIN , Hong-Kyun SOHN
- Applicant: POSCO
- Applicant Address: KR Pohang-si, Gyeongsangbuk-do
- Assignee: POSCO
- Current Assignee: POSCO
- Current Assignee Address: KR Pohang-si, Gyeongsangbuk-do
- Priority: KR10-2012-0154286 20121227
- International Application: PCT/KR2012/011746 WO 20121228
- Main IPC: C23C18/16
- IPC: C23C18/16 ; C23C18/48 ; C23C18/31
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.
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