| 摘要 |
The present invention relates to a Cr-free surface treatment composition and a hot-dip galvanized steel sheet coated with the same. According to the present invention, the Cr-free surface treatment composition is used to form a coating film on the top of a plated layer of the plated steel sheet. Therefore, the steel sheet having excellent corrosion resistance, blackening resistance and fingerprint-proofing properties can be provided. |
