Patent ID: 11866807
Assignee: UACJ CORPORATION; UACJ EXTRUSION CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 3:
4. A method of producing an aluminum alloy pipe comprising:
a hot extrusion process including extruding an Al—Mg series alloy including Mg at a concentration equal to or higher than 0.7 mass % and lower than 2.5 mass % and Ti at a concentration higher than 0 mass % and equal to or lower than 0.15 mass %, with the balance being Al and unavoidable impurities by hot extrusion and obtaining a tubular pipe; and
a Zn-containing layer forming process including forming a Zn-containing layer on an outer surface of the tubular pipe, the Zn-containing layer including Zn being diffused in the Al—Mg series alloy at a concentration equal to or higher than 0.1 mass %.