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公开(公告)号：US09739544B2
公开(公告)日：2017-08-22
申请号：US14382922
申请日：2013-03-08
发明人： Norizumi Matsui , Akihiro Mizuno , Yuko Wada , Junsuki Hokka , Kenji Nakamura , Takayuki Hirose , Kengo Kobayashi
IPC分类号： C23C22/40 , C23C22/56 , F28F13/18 , C23C22/44 , F28F19/06 , C23C22/83 , B23K1/00 , F28F21/08 , B23K1/20 , C23C22/34 , B05D3/10 , B05D3/02 , B23K101/14 , B23K103/10
CPC分类号： F28F13/18 , B05D3/0254 , B05D3/102 , B05D2202/25 , B23K1/0012 , B23K1/20 , B23K2101/14 , B23K2103/10 , C23C22/44 , C23C22/83 , F28F19/06 , F28F21/084
摘要： A surface treatment method for aluminum heat exchangers including (a) a step wherein a chemical conversion coating film is formed on the surface of an aluminum heat exchanger by subjecting the aluminum heat exchanger to chemical conversion using a chemical conversion agent; (b) a step wherein the aluminum heat exchanger, the surface of which has been provided with a chemical conversion coating film in step (a), is brought into contact with a hydrophilizing agent that contains a hydrophilic resin; and (c) a step wherein a hydrophilized coating film is formed on the surface of the aluminum heat exchanger by baking the aluminum heat exchanger, which has been subjected to a contact treatment in step (b). The chemical conversion agent used in step (a) contains zirconium and/or titanium in an amount of 5-5,000 ppm by mass in total, vanadium in an amount of 10-1,000 ppm by mass and a metal stabilizer in an amount of 5-5,000 ppm by mass. In addition, the chemical conversion agent used in step (a) has a pH of 2-6.
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公开(公告)号：US10138559B2
公开(公告)日：2018-11-27
申请号：US14782100
申请日：2014-04-03
发明人： Akihiro Mizuno , Norizumi Matsui
摘要： Provided is a chemical conversion agent that, with respect to an aluminum metal material, etc., contributes to superior corrosion and moisture resistance, contributes to superior adhesion with a laminate film, and contributes to superior hydrofluoric acid and alkali resistance. The chemical conversion agent includes: one or more type of metal 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 metal 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 metal element (A) and the 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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公开(公告)号：US09896766B2
公开(公告)日：2018-02-20
申请号：US14781856
申请日：2014-04-03
发明人： Akihiro Mizuno , Norizumi Matsui , Yuko Wada
IPC分类号： C23C22/80 , C23C22/40 , C23C22/82 , C23C22/34 , C23C22/44 , C23C22/74 , F28F19/06 , F28F21/08 , F28F19/02 , C09D5/08 , C23C22/00 , B05D3/10
CPC分类号： C23C22/34 , B05D3/102 , B05D2202/25 , C09D5/084 , C23C22/40 , C23C22/44 , C23C22/74 , C23C22/82 , F28F19/02 , F28F19/06 , F28F21/084 , F28F2245/02
摘要： 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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公开(公告)号：US09757811B2
公开(公告)日：2017-09-12
申请号：US14346132
申请日：2012-09-20
发明人： Norizumi Matsui , Yuko Wada , Akihiro Mizuno , Junsuke Hokka
IPC分类号： C23C22/34 , C23C22/40 , B23K1/00 , C23C22/44 , C23C22/83 , F28F19/02 , F28F21/08 , B23P15/26 , C23C22/73 , C23C22/00
CPC分类号： B23K1/0012 , B05D2202/25 , B23P15/26 , C23C22/44 , C23C22/73 , C23C22/83 , C23C2222/20 , F28F19/02 , F28F21/084 , F28F2265/22 , Y10T29/49393
摘要： A surface treatment method capable of imparting exceptional corrosion resistance and moisture resistance to an NB heat exchanger. The method includes subjecting an NB heat exchanger to a chemical conversion treatment to form a chemical conversion film on the surface thereof using a chemical conversion treatment agent that contains zirconium and/or titanium in a total amount of 5-5,000 ppm by weight, vanadium in an amount of 10-1,000 ppm by weight, and has a pH of 2-6; bringing the NB heat exchanger on whose surface the chemical conversion film is formed into contact with a hydrophilization agent containing a hydrophilic resin and a guanidine compound and/or a salt thereof; and baking the NB heat exchanger subjected to the contacting process, whereby a hydrophilic film is formed on the surface thereof.
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