发明名称 |
HIGH CORROSION RESISTANCE COMPOSITE PLATED STEEL STRIP AND METHOD FOR MAKING |
摘要 |
<p>Composite plated steel strips comprising a zinc base layer electrodeposited on at least one surface of a steel strip exhibit excellent corrosion resistance with or without painting provided that the zinc base layer contains 0.1 to 10% by weight of cobalt, 0.05 to 5% by weight of chromium, 0.05 to 8% by weight of aluminum, and optionally, 0.05 to 5% by weight of Si, the balance being zinc. Such composite plated steel strips are prepared by subjecting a steel strip to composite electroplating in an acidic zinc plating bath which contains at least one water-soluble compound of Co2+ in an amount of 0.3 to 60 g/l of metallic cobalt, at least one water-soluble compound of Cr3+ in an amount of 0.2 to 2.5 g/l of metallic chromium, a pseudo-boehmite like alumina sol in an amount of 0.5 to 20 g/l of alumina, and optionally, colloidal silica in an amount of 0.5 to 20 g/l at pH 1 or higher and a current density of at least 40 A/dm2.</p> |
申请公布号 |
CA1253450(A) |
申请公布日期 |
1989.05.02 |
申请号 |
CA19850483455 |
申请日期 |
1985.06.07 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
UMINO, SHIGERU;YAMATO, KOJI;KIMURA, HAJIME;ICHIDA, TOSHIO |
分类号 |
C23C2/06;C25D3/56;(IPC1-7):C25D3/56;C23F11/00;C25D7/06;C25D3/22 |
主分类号 |
C23C2/06 |
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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