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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9896766 B1

PDFFull Text
Date of Patent:
Feb. 20, 2018

Filed:

Apr. 03, 2014

Surface processing method for aluminum heat exchanger

Applicant:

Nippon Paint Surf Chemicals Co., Ltd., Tokyo, JP;

Inventors:

Akihiro Mizuno, Tokyo, JP;

Norizumi Matsui, Tokyo, JP;

Yuko Wada, Tokyo, JP;

Assignee:

NIPPON PAINT SURF CHEMICALS CO., LTD., Tokyo, JP;

Attorney:

Muncy, Geissler, Olds & Lowe P.C.

Primary Examiner:

Lois L Zheng

Int. Cl.
CPC ...
C23C 22/80 (2006.01); C23C 22/40 (2006.01); C23C 22/82 (2006.01); C23C 22/34 (2006.01); C23C 22/44 (2006.01); C23C 22/74 (2006.01); F28F 19/06 (2006.01); F28F 21/08 (2006.01); F28F 19/02 (2006.01); C09D 5/08 (2006.01); C23C 22/00 (2006.01); B05D 3/10 (2006.01);
U.S. Cl.
CPC ...
C23C 22/34 (2013.01); C09D 5/084 (2013.01); C23C 22/40 (2013.01); C23C 22/44 (2013.01); C23C 22/74 (2013.01); C23C 22/82 (2013.01); F28F 19/02 (2013.01); F28F 19/06 (2013.01); F28F 21/084 (2013.01); B05D 3/102 (2013.01); B05D 2202/25 (2013.01); F28F 2245/02 (2013.01);
Abstract

Provided is a surface processing method for an aluminum heat exchanger, by which odor can be suppressed and which enables the aluminum heat exchanger to exhibit corrosion resistance and moisture resistance that are excellent to conventional art. The surface processing method for an aluminum heat exchanger uses a chemical conversion treatment agent that includes: one, or two or more type of a metallic element (A) selected from a group comprising of zirconium, titanium, and hafnium; vanadium element (B); and a resin (C). The resin (C) includes a polyvinyl alcohol resin (C1). The ratio (Wa/Wb) of the weight-based total content (Wa) of the metallic element (A) relative to the weight-based content (Wb) of vanadium element (B) is 0.1-15, and the ratio ((Wa+Wb)/Wc1) of the weight-based total content (Wa+Wb) of the metallic element (A) and vanadium element (B) relative to the weight-based total content (Wc1) of the polyvinyl alcohol resin (C1) is 0.25-15.

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