摘要:
A method of surface treating an aluminum alloy base body of an heat exchanger which method enables an etching procedure to be carried out uniformly and quickly and a corrosion-resistant chemical conversion coating to be formed, is effected by pretreating the Al heat exchanger base body with an aqueous pre-treating liquid having a pH of 9.0 or less, etching the pretreated base body with an aqueous alkaline solution having a pH of 9.0 or more, and then subjecting the etched base body to a chemical conversion treatment or a hydrophilicity-enhancing treatment.
摘要:
An aluminum alloy heat exchanger having excellent hydrophilicity and resistance to absorption or impregnation of tobacco odorous components has an organic hydrophilic coating layer formed on at least a portion of a base body of the heat exchanger and containing (A) at least one chitosan compound, (B) at least one two or more carboxyl group-containing organic compound and (C) at least one hydrophilic polymeric substance different from the components (A) and (B), in which the total solid content of components (A) and (B) is 20 mass % or more and the solid content of component (C) is 0.1 to 10 mass %.
摘要:
An aluminum alloy heat exchanger resistive to impregnation of tobacco odor includes a base body of an aluminum alloy heat exchanger and an organic hydrophilic coating layer formed on the surface of the heat exchanger base body, and including a component (A) containing a chitosan compound selected from chitosan and derivatives thereof, and a component (B) containing a carboxylic compound having two or more carboxyl groups per molecule thereof, in a total solid amount of the components (A) and (B) of 20% by mass or more, based on the total amount by mass of the organic hydrophilic coating layer.
摘要:
A hydrophilic modification method comprising a step of forming a coat having a solid coat amount of 0.02 to 3 g/m2 on a heat exchanger with a modifier for hydrophilicity after treatment for rust prevention thereof wherein said modifier for hydrophilicity comprises a modified polyvinyl alcohol (A) having, on a side chain thereof, a group represented by the formula (I): in the formula, n represents an integer of 1 to 500, R1 represents a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and R2 represents a hydrogen atom or a methyl group, and at least one member (B) selected from the group consisting of phosphorus compound salts and boron compound salts of Ca, Al, Mg, Fe and Zn, said group represented by the formula (I) accounting for 0.01 to 20 mole percent relative to hydroxyl and acetoxy groups contained in said modified polyvinyl alcohol.
摘要翻译:一种亲水性改性方法,其特征在于,在具有用于防锈处理后的亲水性改性剂的热交换器上形成具有0.02〜3g / m 2的固体涂层量的涂层的步骤,其中所述亲水性改性剂包含改性聚乙烯醇 A)在其侧链上具有由式(I)表示的基团:在该式中,n表示1〜500的整数,R 1表示氢原子或含有1〜4个碳的烷基 原子,R 2表示氢原子或甲基,以及至少一种选自磷化合物盐和Ca,Al,Mg,Fe和Zn的硼化合物的组分(B),所述基团 由式(I)表示,相对于所述改性聚乙烯醇中所含的羟基和乙酰氧基为0.01〜20摩尔%。
摘要:
An aluminum-containing metal material for, for example, a heat-exchanger for motorcars is surface-treated by chemically etching an Al-containing metal material surface, forming a first protective layer on the etched surface by a chemical conversion treatment with an aqueous solution of Zr phosphate or Ti phosphate, and coating the first protective layer with a second protective layer containing a hydrophilic resin including non-cross-linked hydrophilic functional groups and at least partially cross-linked reactive functional groups different from the hydrophilic functional groups, to impart high hydrophilicity and resistance to odor generation and corrosion to the aluminum-containing metal material surface.
摘要:
A coating structure for a metal member includes a surface-smoothing layer formed on the metal member for smoothing a surface of the metal member, and a fluorine-based film formed on the surface-smoothing layer. The fluorine-based film can be formed by applying a fluorine-containing solution on the surface-smoothing layer, and by drying the fluorine-containing solution. The coating structure can be suitably used for a fuel injection nozzle.
摘要:
A coating structure for a metal member includes a surface-smoothing layer formed on the metal member for smoothing a surface of the metal member, and a fluorine-based film formed on the surface-smoothing layer. The fluorine-based film can be formed by applying a fluorine-containing solution on the surface-smoothing layer, and by drying the fluorine-containing solution. The coating structure can be suitably used for a fuel injection nozzle.
摘要:
A thermoelectric conversion device and a manufacture method for the thermoelectric conversion device are provided. The manufacture method includes a joining process for respectively joining heat exchanging members to thermoelectric-element pairs of an thermoelectric element module, an immersion process for immersing the thermoelectric element module and the heat exchanging members in an immersion sink where an melted insulating material is provided, and a baking process for baking an assembly of the thermoelectric element module and the heat exchanging members where the insulating material has been applied in the immersion process so that an insulating film is formed. Thus, an electrical insulation can be provided while a heat-exchanging capacity and an air-blowing capacity are maintained.