Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

Jun Hisamoto

Koji Wada

Kouki Ikeda

Toshiki Sato

Jun Suzuki

Toshiyuki Tanaka

Nagisa Takee

Hiroshi Sato

Hideo Fujimoto

Akihiro Tsuruno

Shinichi Tanifuji

Masahiro Yanagawa

Masao Takemoto

Yoshinori Ito

Toshiki Ueda

Takashi Onishi

Hirotaka Ito

Kozo Hoshino

Masahiro Kawaguchi

Mamoru Hosokawa

Koki Ikeda

Seigo Yamamoto

Takayuki Tsubota

Hiroo Shige

Koichi Hayashi

Kikuo Toyose

Eiki Usui

Hiroki Sawada

Kazunori Kobayashi

Souichi Hayashi

Asao Mochizuki

Masamichi Aono

Kikurou Toyose

Shoo Katsura

Toshihiro Chikada

Katsuhiro Itayama

Hiroshi Matsuura

The present invention provides a method for forming an anode oxide film, in which on the assumption that a direct-current power source is used, a thick anode oxide film can be formed with good productivity within a short time without using special equipment. The method includes allowing a current Ato pass through an aluminum base material, and includes a step of repeating a first electricity cut-off treatment multiple times, in which when a voltage reaches a voltage Vduring the formation of the film, the passage of electricity is once cut off, this electricity cut-off is continued for a period equal to or longer than an electricity cut-off time T, and the passage of electricity is then resumed, wherein the voltage Vand electricity cut-off time Tsatisfy the prescribed expressions.

Method for formation of anode oxide film

Provided is an anodic oxide processing method in which the generation of cracks is suppressed in an anodic oxide film formed on an aluminum alloy substrate surface, such as an inner wall of a vacuum chamber of a plasma processing device, and an anodic oxide film having low heat reflectivity and a high withstand voltage is formed with high efficiency. The method for forming an anodic oxide film involves forming the anodic oxide film on the surface of a JIS 6061 aluminum alloy substrate in a sulfuric acid solution or a mixed acid solution of sulfuric acid and oxalic acid.

Method for forming anodic oxide film, and aluminum alloy member using the same

The aluminum alloy for anodic oxidation treatment directed to the present invention comprises as alloy elements 0.1 to 2.0% Mg, 0.1 to 2.0% Si, and 0.1 to 2.0% Mn, wherein each content of Fe, Cr, and Cu is limited to 0.03 mass % or less, and wherein the remainder is composed of Al and inevitable impurities. An aluminum alloy more excellent in the durability can be obtained by subjecting the aluminum alloy ingot having the above element composition to a homogenization treatment at a temperature of more than 550&#xb0; C. to 600&#xb0; C. or less. An aluminum alloy member can be obtained by forming an anodic oxidation coating on the surface of the aluminum alloy.

Aluminum alloy for anodizing having durability, contamination resistance and productivity, method for producing the same, aluminum alloy member having anodic oxide coating, and plasma processing apparatus

It is an object of the present invention to provide a titanium electrode material which is low in cost and is excellent in electric conductivity, corrosion resistance and hydrogen absorption resistance, and a surface treatment method of a titanium electrode material. A titanium electrode material includes: on the surface of a titanium material including pure titanium or a titanium alloy, a titanium oxide layer having a thickness of 3 nm or more and 75 nm or less, and having an atomic concentration ratio of oxygen and titanium (O/Ti) at a site having the maximum oxygen concentration in the layer of 0.3 or more and 1.7 or less; and an alloy layer including at least one noble metal selected from Au, Pt, and Pd, and at least one non-noble metal selected from Zr, Nb, Ta, and Hf, having a content ratio of the noble metal and the non-noble metal of 35:65 to 95:5 by atomic ratio, and having a thickness of 2 nm or more, on the titanium oxide layer. The surface treatment method of a titanium electrode material includes a titanium oxide layer formation step, an alloy layer formation step, and a heat treatment step.

Titanium electrode material and surface treatment method of titanium electrode material

A metal separatorfor a fuel cell according to the invention is a metal separator for a fuel cell manufactured by using a metal substratewith a flat surface, or with concave gas flow paths formed on at least a part of the surface. The metal separatorincludes an acid-resistant metal filmformed over the surface of the metal substrate, and containing one or more kinds of non-noble metals selected from the group comprised of Zr, Nb, and Ta, and a conductive alloy filmformed over the acid-resistant metal film, and containing one or more kinds of noble metals selected from the group comprised of Au and Pt, and one or more kinds of non-noble metals selected from the group comprised of Zr, Nb, and Ta. A method for manufacturing the metal separator for a fuel cell according to the invention includes a step Sof depositing an acid-resistant metal film, and a step Sof depositing a conductive alloy film. With this structure, the invention provides the metal separator for a fuel cell with an excellent acid resistance and a low contact resistance, and a manufacturing method thereof.

Metal separator for fuel cell and manufacturing method thereof

Disclosed is anode for use in a lithium ion secondary battery. The anode includes an anode current collector and an anode active material arranged thereon, in which the anode active material contains amorphous carbon and at least one metal dispersed in the amorphous carbon, and the at least one metal is selected from: 30 to 70 atomic percent of Si; and 1 to 40 atomic percent of Sn. The anode gives a lithium ion secondary battery that has a high charge/discharge capacity and is resistant to deterioration of its anode active material even after repetitive charge/discharge cycles.

Anode for lithium ion secondary battery, production method thereof, and lithium ion secondary battery using the same

An aluminum or aluminum alloy member superior in liquid and gaseous corrosion resistance and plasma resistance, which has an anodized film formed thereon which is composed of a porous layer and a non-porous barrier layer whose structure is at least partly boehmite or pseudo-boehmite. Said anodized film is characterized by that the film dissolving rate measured by the test for immersion in a mixture of phosphoric acid and chromic acid (conforming to JIS H8683-2) is less than 120 mg/dm/15 min, the ratio of area in which corrosion occurs after standing for 2 hours in an atmosphere of argon containing 5% chlorine (at 300&#xb0; C.) is less than 15%, and the hardness (Hv) of the film is no lower than 420.

Aluminum alloy member superior in corrosion resistance and plasma resistance

An Al alloy member having excellent corrosion resistance comprises an Al or Al alloy substrate having an anodic oxide film including a porous layer and a pore-free barrier layer. At least a part of a structure of the barrier layer is altered into boehmite and/or pseudo-boehmite, a dissolution rate of the film is at 100 mg/dm /15 minutes or below when determined by an immersion test in phosphoric acid/chromic acid (JIS H 8683-2), and a corroded area percent is at 10% or below after allowing the film to stand in an atmosphere of 5% Cl &mdash;Ar gas at 400&deg; C. for 4 hours.

AL alloy member having excellent corrosion resistance

A chamber material made of Al alloy excellent in thermal cracking resistance and chemical and/or physical corrosion resistance and capable of reducing contamination excellently and further having excellent and wide applicable brazing property in a high temperature corrosive circumstance, in which the substrate aluminum material for the chamber material made of Al alloy having an anodized film comprises 0.1 to 2.0% Si, 0.1 to 3.5% Mg, 0.02 to 4.0% Cu on the mass% basis and the balance of Al and impurity element with Cr in the impurity elements being less than 0.04%. Preferably, Fe is 0.1% or less and Mn is 0.04% or less in the impurity element and, further, the total sum of impurity elements other than Cr and Mn being restricted to 0.1% or less. This invention can be utilized suitably to various materials used in high temperature corrosive circumstance, particularly, in high temperature corrosive gas or plasma atmosphere.

Chamber material made of Al alloy and heater block

Aluminum alloy comprising an anodic oxidation coating and a ceramic coating formed on a surface of the anodic oxidation coating, wherein the anodic oxidation coating contains one or more elements selected from the group consisting of C, N, P, F, B and S at a content of each element in an amount of 0.1 mass % or more, and wherein the ceramic coating comprises one or more selected from the group consisting of oxide, nitride, carbonitride, boride and silicide, wherein when the anodic oxidation coating contains S only, the surface of the aluminum alloy or of the anodic oxidation coating has an average roughness Ra of 0.3 &mgr;m or more.

Anodic oxide layer and ceramic coating for aluminum alloy excellent in resistance to gas and plasma corrosion

An Al material having an anodic oxidation film is provided that is excellent in gas and plasma corrosion resistance. By the present invention, a crack is not generated in the anodic oxidation film even in high temperature thermal cycles and corrosive gas or plasma environment. In the Al material having an Al alloy having on its surface an anodic oxidation film according to the invention, the anodic oxidation film has a porous layer and a barrier layer, and portions of cell triplet points, at which boundary faces of 3 cells in the porous layer melt, have secondary-pores.

Al material excellent in thermal crack resistance and corrosion

Coating film excellent in resistance to halogen-containing gas corrosion

Vacuum chamber made of aluminum or its alloys, and surface treatment and

Surface-treated Al or Al alloy materials which excel in adhesive property, formability, weldability, phosphatability, paint adhesion, and post-painting corrosion resistance are provided by forming a coated layer containing Zn and Fe or one or more of Si oxides, Al oxides and Al hydroxides together therewith, on the surface of Al or Al alloy base. The surface-treated Al or Al alloy materials are useful as metallic material to be painted and used after press forming and other processing, spot or laser welding and phosphating, including panel materials for automobiles and other various vehicles, shells for housefold electrical apparatus, and building materials.

Surface treated aluminum or aluminum alloy material

An aluminum alloy material having a surface suitable for zinc phosphate processing prepared by a process comprising the steps of (1) cleaning the aluminum alloy surface, and (2) forming a composite film layer comprising Zn metal, Ni or Mn metal, and silicon oxide on the surface of the aluminum alloy.

Aluminum alloy material having a surface of excellent zinc phosphate

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Kobe, Japan

Jun Hisamoto