发明名称 |
Method for high speed chromium plating of cylindrical articles |
摘要 |
A method for the high speed chromium plating of piston rings, cylinder liners and the like wherein the cathodic workpiece is rotated at a peripheral speed of 1-4 m/sec. relative to a concentrically disposed anode. The latter may comprise a single spoked member or a plurality of rectangular pieces to thereby create a turbulence in the electrolyte bath. When a cylindrical anode is used, a bladed agitator is secured to the rotating workpiece to generate turbulence. The interelectrode spacing is from 0.1 to 4t cm with a multipolar anode, where t is the thickness of an anode pole. The current density is from 200 - 600 amps/dm2, and the bath temperature is from 20 DEG - 50 DEG C or from 65 DEG - 80 DEG C, depending on the plating characteristics desired.
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申请公布号 |
US4080268(A) |
申请公布日期 |
1978.03.21 |
申请号 |
US19770763746 |
申请日期 |
1977.01.28 |
申请人 |
NIPPON PISTON RING CO., LTD. |
发明人 |
SUZUKI, SHOJI;YODA, KEIICHI;SUZUKI, HIROSHI;YAGUCHI, ISAO;KARASAWA, HITOSHI |
分类号 |
C25D3/04;C25D5/22;C25D7/04;C25D21/10;(IPC1-7):C25D5/08 |
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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