Patent ID: 11933431
Assignee: VALLOUREC OIL AND GAS FRANCE
Field: Surface technology, coating (Chemistry)
Classification: CPC F  C  E | IPC C  F

Claim 12:
13. The threaded connection for pipes according to claim 1, wherein
the high friction coefficient plating layer is selected from the group consisting of a Ni—P alloy plating layer, a Zn—Ni alloy plating layer, a Cu plating layer, a Cr plating layer, and a Cu—Sn—Zn alloy plating layer, and
the low friction coefficient plating layer is selected from the group consisting of a Zn—Ni alloy plating layer, a Cu plating layer, a Cr plating layer, a Cu—Sn—Zn alloy plating layer, and a Zn Plating Layer.