Title:
HEAT EXCHANGER MADE OF ALUMINUM ALLOY
Document Type and Number:
WIPO Patent Application WO/2000/075397
Kind Code:
A1
Abstract:
An aluminum alloy heat exchanger having a film which is free from the emission of an offensive odor, etc., can impart excellent corrosion resistance and hydrophilicity, and contains no harmful chromium. The heat exchanger comprises: a base comprising a tubing and fins and formed by molding an aluminum alloy; a first protective layer which is a chemical conversion coating formed on the base using a treating fluid containing (a) a water-soluble vanadium compound and (b) a fluorozirconium complex compound; and a second protective layer comprising a hydrophilic film formed by coating the first protective layer with a treating fluid which contains (c) a water-compatible polyvinyl alcohol type polymer having 40 mol% or more vinyl alcohol units and 0 to 60 mol%, excluding 60 mol%, at least one kind of additional addition-polymerized units different from the vinyl alcohol units, (d) a polyoxyethylene glycol having a weight-average molecular weight of 6,000 to 1,000,000, (e) a vanadium compound, and (f) a zirconium compound and in which the proportion of the zirconium contained in the compound (f) to the vanadium contained in the compound (e) is 40 to 350% by weight and then drying the treating fluid.
Inventors:
UEHARA TOSHIYUKI (JP)
YOSIDA CHIZUKO (JP)
YAMAZAKI ETSUKO (JP)
NAKADA KAZUYA (JP)
YOSIDA CHIZUKO (JP)
YAMAZAKI ETSUKO (JP)
NAKADA KAZUYA (JP)
Application Number:
PCT/JP2000/003529
Publication Date:
December 14, 2000
Filing Date:
June 01, 2000
Export Citation:
Assignee:
CALSONICKANSEI CORP (JP)
NIHON PARKERIZING (JP)
UEHARA TOSHIYUKI (JP)
YOSIDA CHIZUKO (JP)
YAMAZAKI ETSUKO (JP)
NAKADA KAZUYA (JP)
NIHON PARKERIZING (JP)
UEHARA TOSHIYUKI (JP)
YOSIDA CHIZUKO (JP)
YAMAZAKI ETSUKO (JP)
NAKADA KAZUYA (JP)
International Classes:
C23C22/00; C23C22/34; C23C22/40; C23C22/44; C23C22/73; C23C22/83; F28F1/32; F28F13/18; F28F19/00; F28F19/02; F28F19/04; F28F19/06; B05D7/00; (IPC1-7): C23C22/40; C23C22/66; C23C22/44; C23C22/00; F28F19/06
Foreign References:
EP0015020A1 | 1980-09-03 | |||
JPH01208477A | 1989-08-22 | |||
JPH01306575A | 1989-12-11 | |||
JPH09178392A | 1997-07-11 | |||
JPS63171684A | 1988-07-15 | |||
JPH06116527A | 1994-04-26 | |||
JPH01270977A | 1989-10-30 |
Other References:
See also references of EP 1201788A4
Attorney, Agent or Firm:
Miura, Yuji (Yoyogi 2-chome Shibuya-ku Tokyo, JP)
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