Abstract: A precoated steel sheet according to the present invention addresses the problem of achieving more excellent scratch resistance and more excellent coating film adhesion even in cases where a coating film has a large film thickness. This precoated steel sheet comprises a Zn-containing plating layer, a chemical conversion coating layer containing at least zirconium, and a coating layer; the coating layer contains at least a binder resin and resin particles; the average thickness of the coating film is 3 µm to 10 µm; the intensity of zirconium at the Zn-containing plating layer-side interface of the coating layer is 1.05 to 3.00 times the average intensity of zirconium in the range of 1 µm to 2 µm from the surface of the coating film as calculated based on the depth profile of the zirconium distribution of the coating film as determined by glow discharge optical emission spectrometry; and if a cross-section of the coating film in the thickness direction is examined, the average area ratio of the resin particles in a region having a length of 60 µm in a direction that is perpendicular to the thickness direction is 5% to 30%.
| # | Name | Date |
|---|---|---|
| 1 | 202517028379-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [26-03-2025(online)].pdf | 2025-03-26 |
| 2 | 202517028379-STATEMENT OF UNDERTAKING (FORM 3) [26-03-2025(online)].pdf | 2025-03-26 |
| 3 | 202517028379-REQUEST FOR EXAMINATION (FORM-18) [26-03-2025(online)].pdf | 2025-03-26 |
| 4 | 202517028379-PRIORITY DOCUMENTS [26-03-2025(online)].pdf | 2025-03-26 |
| 5 | 202517028379-POWER OF AUTHORITY [26-03-2025(online)].pdf | 2025-03-26 |
| 6 | 202517028379-FORM 18 [26-03-2025(online)].pdf | 2025-03-26 |
| 7 | 202517028379-FORM 1 [26-03-2025(online)].pdf | 2025-03-26 |
| 8 | 202517028379-DRAWINGS [26-03-2025(online)].pdf | 2025-03-26 |
| 9 | 202517028379-DECLARATION OF INVENTORSHIP (FORM 5) [26-03-2025(online)].pdf | 2025-03-26 |
| 10 | 202517028379-COMPLETE SPECIFICATION [26-03-2025(online)].pdf | 2025-03-26 |
| 11 | 202517028379-Proof of Right [24-04-2025(online)].pdf | 2025-04-24 |
| 12 | 202517028379-FORM 3 [30-07-2025(online)].pdf | 2025-07-30 |