EXPANDED TUBE-TO-TUBESHEET JOINT TYPE HEAT EXCHANGER, AND TUBE MATERIAL AND FIN MATERIAL FOR HEAT EXCHANGER

WIPO Patent Application WO/2011/115133

A1

Disclosed are: an expanded tube-to-tubesheet joint type heat exchanger having excellent corrosion resistance; and a tube material and a fin material for use in the heat exchanger. Specifically disclosed is an expanded tube-to-tubesheet joint type heat exchanger produced by carrying out the expanded tube-to-tubesheet joint of a tube that has, formed on the outer surface thereof, a Zn-diffused layer formed by the thermal spraying of Zn and a diffusion heat treatment and comprises an aluminum alloy to a fin that comprises an aluminum alloy containing at least one element selected from the group consisting of Zn, In, and Sn, wherein the pitting potential of the fin is noble compared with the pitting potential of a part having a Zn concentration that is 2/3 of the surface Zn concentration of the Zn-diffused layer and is poor compared with the pitting potential of a part having a Zn concentration that is 1/3 of the surface Zn concentration.

OYA YOSHIYUKI (JP)
ONDA TOKINORI (JP)
KOZIMA YOICHI (JP)

PCT/JP2011/056099

September 22, 2011

March 15, 2011

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FURUKAWA SKY ALUMINUM CORP (JP)
OYA YOSHIYUKI (JP)
ONDA TOKINORI (JP)
KOZIMA YOICHI (JP)

C22C21/00; C22F1/04; C22F1/053; F28F13/18; F28F19/06; C22F1/00

JPH10306337A	1998-11-17
JP2000169926A	2000-06-20
JP2007071526A	2007-03-22
JP2004170061A	2004-06-17
JPH093580A	1997-01-07
JP2004176178A	2004-06-24
JP2007528297A	2007-10-11
JP2008208416A	2008-09-11
JP2008266738A	2008-11-06
JP2011085290A	2011-04-28

SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)
SK patent business corporation (JP)

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