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Patent Searching and Data


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)
Application Number:
PCT/JP2000/003529
Publication Date:
December 14, 2000
Filing Date:
June 01, 2000
Export Citation:
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Assignee:
CALSONICKANSEI CORP (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:
EP0015020A11980-09-03
JPH01208477A1989-08-22
JPH01306575A1989-12-11
JPH09178392A1997-07-11
JPS63171684A1988-07-15
JPH06116527A1994-04-26
JPH01270977A1989-10-30
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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