Title:
PRE-COATED FIN MATERIAL FOR HEAT EXCHANGER
Document Type and Number:
Japanese Patent JPH1183384
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pre-coated fin material for a heat exchanger in which a close fitness of a water glass hydrophilic film against an anti-corrosion base film is kept superior, even if it is left in a wet environment in particular for a long period of time, a desired hydrophilic characteristic and an anti-corrosion characteristic are maintained positively. SOLUTION: This pre-coated fin material for this heat exchanger is made such that an anti-corrosion base film comprised of compound for forming anticorrosion film formation containing as its substance non-cyclic polyhydric alcohol with valence value of 3 or more with more than three monohydric alcohols within a molecule, and a hydrophilic film composed of compound forming hydrophilic film containing as its major substances alkaline silicate, partial-neutralized polyacrylic acid and non-cyclic polyhydric alcohol with valence value of 3 or more within a molcule, are formed in this sequence at the surface of aluminum or its alloy. Then, either washing with water or pickling processing is carried out after forming the hydrophilic film.
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Inventors:
TAKAZAWA REIKO
ISHII TORU
YAMAZAKI KAZUHIKO
ISHII TORU
YAMAZAKI KAZUHIKO
Application Number:
JP24654397A
Publication Date:
March 26, 1999
Filing Date:
September 11, 1997
Export Citation:
Assignee:
NIPPON LIGHT METAL CO
International Classes:
F28F19/04; B05D7/14; C23C22/00; (IPC1-7): F28F19/04; B05D7/14; C23C22/00
Attorney, Agent or Firm:
Katsuo Naruse (2 outside)