基本信息:
- 专利标题： STEEL SHEET FOR CANS AND PRODUCTION METHOD FOR STEEL SHEET FOR CANS
- 申请号：EP16872892.1 申请日：2016-12-01
- 公开(公告)号：EP3388549A1 公开(公告)日：2018-10-17
- 发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya
- 申请人： JFE Steel Corporation
- 申请人地址： 2-3, Uchisaiwai-cho 2-chome Chiyoda-ku Tokyo 100-0011 JP
- 专利权人： JFE Steel Corporation
- 当前专利权人： JFE Steel Corporation
- 当前专利权人地址： 2-3, Uchisaiwai-cho 2-chome Chiyoda-ku Tokyo 100-0011 JP
- 代理机构： Grünecker Patent- und Rechtsanwälte PartG mbB
- 优先权： JP2015241871 20151211
- 国际公布： WO2017098994 20170615
- 主分类号： C23C28/00
- IPC分类号： C23C28/00 ; C25D5/16 ; C25D5/26 ; C25D9/10 ; C25D11/38 ; C25D21/12 ; C25F3/08
摘要：
Provided is a steel sheet for cans that has an excellent surface appearance. Also provided is a production method for the steel sheet for cans. The steel sheet for cans has, on the surface thereof, in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The chromium metal layer is deposited in an amount of 65-200 mg/m 2 , and the hydrous chromium oxide layer is deposited in an amount of 3-15 mg/m 2 in terms of chromium. The chromium metal layer includes: a flat chromium metal layer that has a thickness of at least 7 nm; and a granular chromium metal layer that includes granular protrusions that are formed on the surface of the flat chromium metal layer. The maximum grain size of the granular protrusions is 100 nm or smaller. The number density of the granular protrusions per unit area is 10/µm 2 or higher.