Abstract: The present invention provides an aluminum alloy and an aluminum alloy clad material which are capable of retaining corrosion resistance even when a sacrificial material is not used. The present invention is a surface-treated aluminum alloy, in which: a surface film is formed at least on one surface of the aluminum alloy; the thickness of the surface film is 0.1 to 10 ?m; a material forming the surface film contains oxides having a standard free energy of formation of 500 kJ/mol or less at a temperature of 500 K by 80% by mass or more in total; and the average particle size of the oxides is 5 to 50 nm.

Abstract: A core material for an aluminum alloy clad material contains Si in a content of 0.3% to 1.5% (hereinafter “%” means “percent by mass”), Mn in a content of 0.3% to 2.0%, Cu in a content of 0.3% to 1.5%, Ti in a content of 0.01% to 0.5%, and B in a content of 0.001% to 0.1%, with the remainder including Al and inevitable impurities. The core material and an aluminum alloy clad material using the same ensure sufficient corrosion resistance and give a product having an extended life.

Abstract: A core material for an aluminum alloy clad material contains Si in a content of 0.3% to 1.5% (hereinafter “%” means “percent by mass”), Mn in a content of 0.3% t 2.0%, Cu in a content of 0.3% to 1.5%, Ti in a content of 0.01% to 0.5%, and B in a content of 0.001% to 0.1%, with the remainder including Al and inevitable impurities. The core material and an aluminum alloy clad material using the same ensure sufficient corrosion resistance and give a product having an extended life.

Abstract: Disclosed is an aluminum alloy clad material which includes a core material; a sacrificial anode material on one surface of the core material; and a filler material on the other surface of the core material and composed of an Al—Si alloy, in which the core material contains 0.3 to 2.0 percent by mass of Mn, 0.15 to 1.6 percent by mass of Si, 0.1 to 1.0 percent by mass of Cu, and 0.1 to 1.0 percent by mass of Mg, with the remainder including Al and inevitable impurities, the sacrificial anode material contains 7.0 to 12.0 percent by mass of Zn, 0.3 to 1.8 percent by mass of Mn, and 0.3 to 1.2 percent by mass of Si, with the remainder including Al and inevitable impurities, and has a thickness of 10 to 30 ?m. The sacrificial anode material shows resistance to both local corrosion and general corrosion.

Abstract: An aluminum alloy clad sheet for heat exchangers includes a core layer, a sacrificial layer disposed on one side of the core layer, and a brazing layer of an Al—Si alloy disposed on the other side of the core layer, wherein the core layer contains Si: 0.15% to 1.6% by mass, Mn: 0.3% to 2.0% by mass, Cu: 0.1% to 1.0% by mass, Ti: 0.02% to 0.30% by mass, and the remainder of Al and incidental impurities, and the sacrificial layer contains Zn: 4.0% to 10.0% by mass, Cr: 0.01% to 0.5% by mass, and the remainder of Al and incidental impurities.

Abstract: An aluminum alloy clad sheet for heat exchangers includes a core layer, a sacrificial layer disposed on one side of the core layer, and a brazing layer of an Al—Si alloy disposed on the other side of the core layer, wherein the core layer contains Si: 0.15% to 1.6% by mass, Mn: 0.3% to 2.0% by mass, Cu: 0.1% to 1.0% by mass, Ti: 0.02% to 0.30% by mass, and the remainder of Al and incidental impurities, and the sacrificial layer contains Zn: 4.0% to 10.0% by mass, Cr: 0.01% to 0.5% by mass, and the remainder of Al and incidental impurities.

Abstract: An aluminum alloy clad sheet for heat exchangers includes a core layer, a sacrificial layer disposed on one side of the core layer, and a brazing layer of an Al—Si alloy disposed on the other side of the core layer, wherein the core layer contains Si: 0.15% to 1.6% by mass, Mn: 0.3% to 2.0% by mass, Cu: 0.1% to 1.0% by mass, Ti: 0.02% to 0.30% by mass, and the remainder of Al and incidental impurities, and the sacrificial layer contains Zn: 4.0% to 10.0% by mass, Cr: 0.01% to 0.5% by mass, and the remainder of Al and incidental impurities.

Abstract: A process for producing a joint structure of a steel sheet and an aluminum sheet, in which the steel sheet and the aluminum sheet are joined to each other so as to be electrically connected to each other. The process is characterized by comprising a step of forming at least one resin coating film in a thickness of 0.1 to 5.0 ?m on a contact surface on the steel sheet side, wherein the resin is selected from the group consisting of a polyolefin resin, a polyurethane resin and an epoxy resin.

Abstract: A core material for an aluminum alloy clad material contains Si in a content of 0.3% to 1.5% (hereinafter “%” means “percent by mass”), Mn in a content of 0.3% to 2.0%, Cu in a content of 0.3% to 1.5%, Ti in a content of 0.01% to 0.5%, and B in a content of 0.001% to 0.1%, with the remainder including Al and inevitable impurities. The core material and an aluminum alloy clad material using the same ensure sufficient corrosion resistance and give a product having an extended life.

Abstract: A titanium alloy material includes a Ti—Al alloy and an oxide film on the Ti—Al alloy. The Ti—Al alloy contains 0.50-3.0 mass % Al and a balance of Ti and unavoidable impurities. The titanium alloy material has excellent hydrogen absorption resistance and can be used as a basic structural material in hydrogen absorption environments.

Abstract: Disclosed is an aluminum alloy clad material which includes a core material; a sacrificial anode material on one surface of the core material; and a filler material on the other surface of the core material and composed of an Al—Si alloy, in which the core material contains 0.3 to 2.0 percent by mass of Mn, 0.15 to 1.6 percent by mass of Si, 0.1 to 1.0 percent by mass of Cu, and 0.1 to 1.0 percent by mass of Mg, with the remainder including Al and inevitable impurities, the sacrificial anode material contains 7.0 to 12.0 percent by mass of Zn, 0.3 to 1.8 percent by mass of Mn, and 0.3 to 1.2 percent by mass of Si, with the remainder including Al and inevitable impurities, and has a thickness of 10 to 30 ?m. The sacrificial anode material shows resistance to both local corrosion and general corrosion.

Abstract: It is an object of the invention to provide a titanium alloy material that exerts excellent corrosion resistance at a low cost in non-oxidizing environment such as a sulfuric acid environment, high temperature neutral chloride environment, or high temperature neutral chloride environment containing fluoride, a structural member using the titanium alloy material, and a container for radioactive waste using the titanium alloy material. Disclosed are a titanium alloy containing ruthenium (Ru): 0.005-0.10 mass %, palladium (Pd): 0.005-0.10 mass %, nickel (Ni): 0.01-2.0 mass %, chromium (Cr): 0.01-2.0 mass %, vanadium (V): 0.01-2.0 mass %, with the remainder including titanium (Ti) and inevitable impurities, and a structural member and a container for radioactive waste using the titanium alloy material.

Abstract: Disclosed is a surface-treated metal material which includes a metallic base including a steel or aluminum material; and an anti-corrosive layer present covering at least one surface of the metallic base. The anti-corrosive layer contains 0.001 to 1 g/m2 of one or more substances selected from the group consisting of benzoic acid salts, glutamic acid salts, anisidines, glycine, and quinolinols. The benzoic acid salts and/or glutamic acid salts are preferably chosen from potassium salt, sodium salt and ammonium salt. Also disclosed is a joined article of dissimilar materials including the surface-treated metal material as at least one of the materials. The surface-treated metal material includes, as the base metal, a steel or aluminum material and is thereby effectively and inexpensively protected from galvanic corrosion without performing electrical insulation or complete atmospheric isolation.

Abstract: An aluminum alloy clad sheet for heat exchangers includes a core layer, a sacrificial layer disposed on one side of the core layer, and a brazing layer of an Al—Si alloy disposed on the other side of the core layer, wherein the core layer contains Si: 0.15% to 1.6% by mass, Mn: 0.3% to 2.0% by mass, Cu: 0.1% to 1.0% by mass, Ti: 0.02% to 0.30% by mass, and the remainder of Al and incidental impurities, and the sacrificial layer contains Zn: 4.0% to 10.0% by mass, Cr: 0.01% to 0.5% by mass, and the remainder of Al and incidental impurities.

Abstract: A titanium material of the present invention includes a base material composed of a titanium alloy containing at least one alloying element selected from the group consisting of gold, silver, and platinum group elements; and a concentrated layer integrally disposed as a layer on the surface of the base material. In the concentrated layer, the alloying elements are concentrated by elution of Ti from the surface of the base material. The average thickness of the concentrated layer is 2.5 nm or more. The total alloying element concentration in the concentrated layer is 40 to 100 atomic percent. The total content of the alloying element in the base material is 0.01 to 1.0 percent by mass. Electrodes composed of the titanium material of the present invention are suitable for use in separators of fuel cells, and can readily be produced, so that the cost can be reduced.

Abstract: A titanium alloy scarcely undergoing brittling caused by hydrogen even in case of being used under hydrogen-absorbing conditions. This alloy comprises a Ti—Al alloy composed of from 0.50 to 3.0% of Al with the balance of Ti together with unavoidable contaminants. A Ti—Al alloy material excellent in hydrogen absorption-resistance wherein an oxidized film of 1.0 to 100 nm in thickness is formed on a bulk made of a Ti—Al alloy satisfying the chemical composition as described above, and, further, a concentrated Al layer having an Al concentration of 0.8 to 25% higher by 0.3% or more than the bulk is optionally formed between the bulk and the oxidized film.

Abstract: A welding wire capable of improving wettability between weld metal and wire surface, thereby providing excellent drawability and weldability in resistance welding of wires is provided. A wire is dipped in an aqueous solution of a sulfide of alkali metal or ammonium sulfide to generate iron sulfide (FeS.sub.2 or FeS) on the surface, whereby the wettability of weld metal to wire surface is improved in the resistance welding of the resulting wires. The S in the iron sulfide is preferably present in an amount of 0.1-20 atomic % as measured by X-ray photoelectron spectroscopy. At least one sulfide of S with an element of Mn, Ti, Cu, Cr, Ni, Al or Zn can be used instead of or in addition to the iron sulfide.