ALUMINUM FIN MATERIAL AND ITS MANUFACTURING METHOD

• Main Authors: TOYODA YUSUKE, HATTORI NOBUO, TATEYAMA KEITA
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMBINED HEATING AND REFRIGERATION SYSTEMS; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; DIFFUSION TREATMENT OF METALLIC MATERIAL; HEAT EXCHANGE IN GENERAL; HEAT PUMP SYSTEMS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; WEAPONS

PROBLEM TO BE SOLVED: To provide an aluminum fin material with high resistance to alkali solution and its manufacturing method while having a preferable anticorrosion characteristic and hydrophilicity of the fin material surface lasts for a long time.SOLUTION: An aluminum fin material 1 according to the present invention comprises: an undercoat treatment layer 3; a corrosion-resistant film layer 4; and a hydrophilic film layer 5 that are formed on the surface of an aluminum plate 2 or an aluminum alloy plate 2 in this order, the undercoat treatment layer 3 is made of inorganic oxide or inorganic-organic composite compound; the corrosion-resistant film layer 4 is made of the resin composition containing an acrylic acid resin; the hydrophilic film layer 5 is made of the resin composition containing a resin A containing a sulfonic acid group and the like and a resin B containing a carboxyl group; and PH of the extract obtained when the hydrophilic film layer 5 is dipped into ion exchange water is 8.0 to 10.0.SELECTED DRAWING: Figure 1 【課題】良好な耐食性を備え、フィン材表面の親水性が長期間持続すると共に、アルカリ性溶液に対する耐性が高いアルミニウム製フィン材およびその製造方法を提供する。【解決手段】本発明に係るアルミニウム製フィン材１は、アルミニウム板２またはアルミニウム合金板２の表面に下地処理層３と、耐食性皮膜層４と、親水性皮膜層５と、をこの順に備え、下地処理層３は、無機酸化物または無機−有機複合化合物からなり、耐食性皮膜層４は、アクリル酸系樹脂を含む樹脂組成物からなり、親水性皮膜層５は、スルホン酸基などを有する樹脂Ａと、カルボキシル基を有する樹脂Ｂと、を含む樹脂組成物からなり、親水性皮膜層５をイオン交換水に浸漬させたとき、得られる抽出液のｐＨが８．０〜１０．０であることを特徴とする。【選択図】図１