To provide a heat transfer pipe and header pipes capable of maintaining corrosion resistance and flow-induced corrosion resistance for a long time in an operating environment of an open rack type carburetor.
The heat transfer pipe 2 or the header pipe 3, 4 of the open rack type carburetor 10 includes: a base material comprising aluminum alloy; a sacrificial positive electrode layer positioned on the outer surface of the base material, covered by thermal spraying and comprising aluminum alloy; and a passive film formed on the outer surface side of the sacrificial positive electrode layer, based on one or more of aluminum oxide and aluminum hydroxide and having 0.001-1 m of thickness. The passive film is formed by applying a potential which is lower than a self-potential of aluminum alloy forming the sacrificial positive electrode layer and is -1,500 mV or larger on the basis of saturated calome electrode to the sacrificial positive electrode layer for 0.1-10 hours.
URUSHIBARA WATARU
| JP2004264692A | 2004-09-24 | |||
| JPH04363595A | 1992-12-16 | |||
| JPH11293373A | 1999-10-26 | |||
| JP2006371371A | ||||
| JP2005325430A | 2005-11-24 | |||
| JPH07180023A | 1995-07-18 | |||
| JPH11293373A | 1999-10-26 | |||
| JP2006371371A | ||||
| JP2004264692A | 2004-09-24 | |||
| JPH04363595A | 1992-12-16 |
| WO2006134737A1 | 2006-12-21 |
Etsuo Tada
Tetsuo Tomita