| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aluminum alloy extrusion tube composed of an alloy having extrusion property at the time of forming even in the case the thickness of an extruding material with a hollow shape is thin, also having sufficient material strength and further having excellent local corrosion resistance in a low concentration zinc-diffused layer. <P>SOLUTION: The aluminum alloy extrusion tube 1 for a heat exchanger is characterized in that the outer surface of an Al alloy extrusion material having a composition comprising, by mass, 0.5 to 1.0% Si, 0.5 to 1.4% Mn and 0.1 to 0.25% Ti, and the balance Al with inevitable impurities is provided with a Zn or Zn-containing layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
