Title:
ALUMINUM ALLOY HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2019/225511
Kind Code:
A1
Abstract:
An aluminum alloy heat exchanger to be used in an environment where the atmosphere side is a diluted chloride ion environment of 1,000 ppm or less, and characterized in that: the core material thereof comprises an aluminum alloy which contains 0.60-2.00 mass% of Mn and no more than 1.00 mass% of Cu, with the remainder being aluminum and inevitable impurities; the sacrificial anode material thereof comprises an aluminum alloy containing 2.50-10.00 mass% of Zn, with the remainder being aluminum and inevitable impurities; the pitting potential in a 5% NaCl solution of the sacrificial anode material surface of a tube in the aluminum alloy heat exchanger is no greater than -800 (mV vs Ag/AgCl); and the pitting potential in a 5% NaCl solution of an aluminum fin of the aluminum alloy heat exchanger is less than the pitting potential in the 5% NaCl solution of the sacrificial anode material surface of the tube. The present invention makes it possible to provide an aluminum alloy heat exchanger which exhibits excellent outer surface corrosion resistance in environments where the atmosphere side is a diluted chloride ion environment.
Inventors:
SHOJI TOMOHIRO (JP)
KYO YOSHIHIKO (JP)
FUKUMOTO ATSUSHI (JP)
OYA YOSHIYUKI (JP)
SHINODA TAKAHIRO (JP)
NAKASHITA KOICHI (JP)
GOTO NAOTO (JP)
KYO YOSHIHIKO (JP)
FUKUMOTO ATSUSHI (JP)
OYA YOSHIYUKI (JP)
SHINODA TAKAHIRO (JP)
NAKASHITA KOICHI (JP)
GOTO NAOTO (JP)
Application Number:
PCT/JP2019/019759
Publication Date:
November 28, 2019
Filing Date:
May 17, 2019
Export Citation:
Assignee:
UACJ CORP (JP)
DENSO CORP (JP)
DENSO CORP (JP)
International Classes:
C22C21/00; F28F19/06; F28F21/08
Foreign References:
| JP2005016937A | 2005-01-20 | |||
| JP2014114506A | 2014-06-26 |
Attorney, Agent or Firm:
ASHITABA INTERNATIONAL PATENT OFFICE (JP)
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