Uacj Corporation

Denso Corporation

Furukawa-sky Aluminum Corporation

Uacj Copper Tube Corporation

Njt Copper Tube Corporation

Yoshiyuki Oya

Akio Niikura

Makoto Ando

Sadayuki Kamiya

Atsushi Fukumoto

Yoichi Kojima

Masaki Harada

Takashi Murase

Kazuko Fujita

Tomohito Kurosaki

Yoshihiko Kyo

Masafumi Saito

Taketoshi Toyoma

Tomohiro Shoji

Yoshikazu Suzuki

Kenji Negura

Takahiro Shinoda

Shota Terachi

Junji Ninomiya

Nobuyuki Kakimoto

Naoto Goto

Hirokazu Tamagawa

Koichi Nakashita

An aluminum alloy heat exchanger includes a core material formed of an aluminum alloy comprising Mn of 0.60 to 2.00 mass % and Cu of 1.00 mass % or less, with the balance being Al and inevitable impurities, and a sacrificial anode material formed of an aluminum alloy comprising Zn of 2.50 to 10.00 mass %, with the balance being Al and inevitable impurities. Pitting potential of a sacrificial anode material surface of a tube of the aluminum alloy heat exchanger in a 5% NaCl solution is −800 (mV vs Ag/AgCl) or less, and pitting potential of an aluminum fin of the aluminum alloy heat exchanger in a 5% NaCl solution is less than the pitting potential of the sacrificial anode material surface of the tube of the aluminum alloy heat exchanger in a 5% NaCl solution.

Aluminum alloy heat exchanger

Provided is a corrosion resistant copper tube which can exhibit a further improved resistance to ant nest corrosion, and which is suitably usable as a heat transfer tube and refrigerant tube in air-conditioning equipment and refrigerating equipment. The copper tube is formed of a copper material comprising a copper alloy consisting of 0.15-0.50% by weight of phosphorus and the balance being copper and impurities, wherein the copper material includes phosphorus oxide particles, such that a number density of particles having a circle equivalent diameter of not less than 0.1 &#x3bc;m among the phosphorus oxide particles is not more than 50000/mm.

Highly resistant copper tube against ant nest corrosion

An aluminum alloy brazing sheet having high corrosion resistance is provided, which develops the sacrificial anticorrosion effect in both surfaces of the sheet, which has the brazing function in one of both the surfaces, and which prevents the occurrence of preferential corrosion. A channel forming component for a vehicular heat exchanger is also provided by utilizing the aluminum alloy brazing sheet. An aluminum alloy brazing sheet having high corrosion resistance includes an aluminum alloy core, a filler material clad on one surface of the core, and a sacrificial anode material clad on the other surface of the core, wherein the filler material, the sacrificial anode material, and the core have respective predetermined alloy compositions. A channel forming component for a vehicular heat exchanger is manufactured using the aluminum alloy brazing sheet having high corrosion resistance.

High corrosion-resistant aluminum alloy brazing sheet and channel forming component for vehicular heat exchanger using same

An aluminum alloy brazing sheet having a good brazing property that prevents diffusion of molten filler material in a core material of the aluminum alloy brazing sheet during a brazing process and which has a superior corrosion resistance to an exhaust gas condensate water after the brazing process is disclosed. A method of manufacturing of the aluminum alloy brazing sheet also is disclosed. A high corrosion-resistant heat exchanger that employs the aluminum alloy brazing sheet also is disclosed.

High corrosion-resistant aluminum alloy brazing sheet, method of manufacturing such sheet, and corrosive-resistant heat exchanger using such sheet

Aluminum alloy material containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mmor more to 7&#xd7;10pcs/mmor less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 &#x3bc;m are present in a cross-section of the aluminum alloy material, while 100 pcs/mmor more to 7&#xd7;10pcs/mmor less of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 &#x3bc;m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.

Aluminum alloy material, aluminum alloy structure, and manufacturing method for same

An aluminum alloy material contains Si: 1.0 mass % to 5.0 mass % and Fe: 0.01 mass % to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mmor more to 7&#xd7;10pcs/mmor less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 &#x3bc;m are present in a cross-section of the aluminum alloy material, while 100 pcs/mmto 7&#xd7;10pcs/mmof Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 &#x3bc;m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.

High-corrosion-resistant aluminum alloy brazing sheet, method of manufacturing such sheet, and corrosive-resistant heat exchanger using such sheet

A heat exchanger which has i) a fin material comprising a triple-layer clad material constituted of a core material composed of an aluminum alloy containing from 0.5 to 1.8% by weight of Mn and from 0.5 to 3.0% by weight of Zn and, provided on both sides of the core material, a brazing filler material composed of an Al&#x2014;Si alloy containing from 6.5 to 13.0% by weight of Si and from 0.15 to 0.60% by weight of Cu and ii) an aluminum alloy tube having a Zn concentrated surface; the both having been brazed with each other; wherein, after brazing, recrystallized grains of the core material have an average length of from 100 to 1,000 &#x3bc;m in the lengthwise section of a fin and the recrystallized grains of the core material are 4 or less in average number in the thickness direction of that lengthwise section. This heat exchanger is improved in the durability of fin joints and fins themselves and their strength after corrosion.

Heat exchanger and fin material for the heat exchanger

Growing community of inventors

Tokyo, Japan

Yoshiyuki Oya