发明名称 |
CHROME ELECTRO PLATING TIN-FREE STEEL WITH INTERVENING ANODIC TREATMENT |
摘要 |
<p>A tin-free steel strip comprising a steel strip, 40 to 150 mg/m2 of a metallic chromium layer on the steel surface, and 5 to 25 mg/m2 of a non-metallic chromium layer thereon wherein the metallic chromium layer contains a plurality of protrusions, exhibits improved corrosion resistance and weldability and is thus useful in the manufacture of welded cans. Preferably, 1X1011 to 1x1014 protrusions having a diameter of 5 to 1000 nm at the base thereof are present per square meter of the metallic chromium layer surface. The tin-free steel strip is produced by chromium plating a steel strip in an aqueous solution containing Cr6+ preferably to a weight of 40 to 140 mg/m2, subjecting the chromium plated strip to anodic electrolysis, preferably at an electricity quantity of 0.1 to 10 C/dm2, and subjecting the strip to a cathodic treatment in an aqueous solution containing Cr6+ and a chromium plating aid so as to deposit additional metallic chromium, preferably in a weight of 10 to 60 mg/m2.</p> |
申请公布号 |
CA1272159(A) |
申请公布日期 |
1990.07.31 |
申请号 |
CA19860504147 |
申请日期 |
1986.03.14 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
OGATA, HAJIME;NAKAKOUJI, HISATADA;AKEDA, YASUHIRO;ICHIDA, TOSHIO;IRIE, TOSHIO;OTSUKA, SACHIKO |
分类号 |
C25D3/04;C25D11/38;(IPC1-7):C25D5/14;C25D9/00 |
主分类号 |
C25D3/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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