Mitsubishi Aluminum Company, Ltd.

Mitsubishi Aluminum Kabushiki Kaisha

Hajime Kudo

Yo Takeuchi

Ken Toma

Masami Asano

Hitoshi Saito

Katashi Katsumata

Tetsuji Iwama

A composition for brazing aluminum or aluminum alloy characterized in that said composition contains aluminum alloy powder for brazing and thermoplastic acryl-based resin binder which is so volatile as to volatilize before being carbonized at a brazing temperature and said resin binder of 0.1 to 50 parts is used for aluminum alloy powder of 100 parts. When this technological idea was applied to brazing with a brazing material of aluminum alloy powder such as, for example, Al-Si, a preferable result of brazing could be obtained.

Composition for brazing aluminum or aluminum alloy and an aluminum or

A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved in a position to enhance the formation of zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

Heat exchanger and method of producing same

A method of producing a heat exchanger comprising abutting a tube made of an aluminum material and fins made of an aluminum material, applying to the resulting abutments a flux containing zinc halide, and thereafter conducting a reaction soldering in an inert gas atmosphere. The assembled tube and fins applied with the flux may be moved into a position to enhance the formation if zinc deposited by the reaction soldering during the drying step of the flux. The heat exchanger produced by this method has a thick and uniform Zn coating at the joints with good mechanical strength and surface conditions.

Method of brazing a heat exchanger using a reaction flux

A method for manufacturing a novel heat exchanging vehicle comprising the steps of forming an inorganic surface layer over a cold rolled, aluminum or aluminum alloy sheet; treating the inorganic surface layer with a phosphoric compound solution; annealing the sheet; and forming the sheet into a predetermined shape. The resulting heat exchanging vehicle such as a fin has a good wettability and a high corrosion resistance to white rust based on the uniformity of the said surface layer.

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Susono-shi, Japan

Hajime Kudo