发明名称 Corrosion-resistant thread joint for percussion drill element and method of achieving such resistance
摘要 A percussive drilling component includes a cylindrical male screw thread formed of a steel material. The thread includes thread crests and thread roots interconnected by thread flanks. To protect the thread against corrosion, the thread is coated with a material having a lower electrode potential than the steel material. The coating is situated at least in regions located radially inwardly of the thread flanks. The male screw thread can be attached to a female screw thread of another percussive drilling component, the female screw thread also being coated with the material.
申请公布号 US2001029807(A1) 申请公布日期 2001.10.18
申请号 US20010796441 申请日期 2001.03.02
申请人 LINDEN JOHAN 发明人 LINDEN JOHAN
分类号 B23B45/16;E21B17/042;F16B33/02;F16B33/06;F16B37/00;(IPC1-7):C22C1/00 主分类号 B23B45/16
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