Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1993-03-08
1995-02-14
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29890141, 29890144, 29435, 138154, 148411, 148519, B21K 2900
Patent
active
053883195
ABSTRACT:
The invention provides a method for making an organism deposit-inhibition pipe, which excels in corrosion resistance, dispenses with maintenance work, and offers no toxicity problems. A thin sheet comprising a copper alloy is wound spirally around a round bar and inserted into a resin pipe made up of an electrical insulating material. And the round bar is taken out. The obtained pipe has an inner wall which is covered with the copper thin sheet. The copper alloy has a Be content of 0.2 to 2.8% by weight, and is selected from, e.g., Be--Cu, Be--Co--Cu, Be--Co--Si--Cu and Be--Ni--Cu alloys. The beryllium-copper alloy has a remarkable antifouling effect and provides a continued liberation of copper ions.
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Eley Timothy V.
NGK Insulators Ltd.
Nguyen Khan V.
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