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A solid lubricating coating formed on a contact surface of a threaded joint for pipes has a matrix of a lubricating oil-containing polymer. The lubricating oil-containing polymer has either a uniform composition or a gradient composition in which the concentration of lubricating oil decreases toward...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Kunio Goto, Keishi Matsumoto, Takao Kuranishi
Format: Patent
Sprache:por
Schlagworte:
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Beschreibung
Zusammenfassung:A solid lubricating coating formed on a contact surface of a threaded joint for pipes has a matrix of a lubricating oil-containing polymer. The lubricating oil-containing polymer has either a uniform composition or a gradient composition in which the concentration of lubricating oil decreases towards the contact surface and in which there is substantially no lubricating oil in the vicinity of the contact surface.