40results about How to "Full corrosion resistance" patented technology

An electrically conductive flow-field plate in a proton exchange membrane fuel cell comprises a composition made of a resin and a plurality of carbon nanotubular fibers having an average diameter is at least about 0.5 nm and up to about 300 nm. The carbon nanotubular fibers are present at not more than about 85 wt. %. The resin can be of a thermoplastic type, a fluorinated type, a thermosetting type and a liquid crystalline type.

Provided are: a ferritic stainless steel which has sufficient corrosion resistance and excellent formability; and a method for producing this ferritic stainless steel. The ferritic stainless steel according to the present invention contains, in mass%, 0.005-0.05% of C, 0.02-0.50% of Si, 0.05-1.0% of Mn, 0.04% or less of P, 0.01% or less of S, 15.5-18.0% of Cr, 0.001-0.10% of Al and 0.01-0.06% of N, with the balance made up of Fe and unavoidable impurities. This ferritic stainless steel is configured to satisfy El>=25%, (average r value)>=0.70 and the absolute value of delta r<=0.20.

Provided are a ferritic stainless steel sheet having adequate corrosion resistance and excellent forming properties and ridging resistance, and a method for manufacturing the same. This ferritic stainless steel sheet contains, in terms of % by mass, 0.005-0.025% C, 0.02-0.50% Si, 0.55-1.00% Mn, 0.04% or less of P, 0.01% or less of S, 0.001-0.10% Al, 15.5-18.0% Cr, 0.1-1.0% Ni, and 0.005-0.025% N,the remainder comprising Fe and unavoidable impurities, the breaking elongation of the ferritic stainless steel sheet being 28% or greater, the average r value thereof being 0.75 or greater, and the minimum value of the maximum logarithmic strain of the forming limit based on a forming limit diagram (FLD) being 0.15 or greater.

PROBLEM TO BE SOLVED: To provide an aqueous coating composition which improves various defects possessed by a self-emulsifiable epoxy resin, excels in water resistance, has sufficient processability, corrosion resistance, and slip properties at the same time when used as a can coating, particularly a lid coating, and can form a coating film having both flavor properties and adhesion when used as an inner surface coating for a bottomed cylindrical member. SOLUTION: The aqueous coating composition comprises an acrylic-modified epoxy resin (1), a basic compound, and an aqueous medium. Here, the acrylic-modified epoxy resin (1) is obtained by reacting part of the epoxy groups of an epoxy resin (a1) with part of the carboxy groups of a carboxy group-containing acrylic resin (a2) having an acid value X<SB>a< / SB>(mgKOH / g) of 10≤X<SB>a< / SB>≤135, a glass transition temperature Tg (°C) of -20≤Tg≤20, and a weight average molecular weight Mw of 10,000≤Mw≤200,000 and a carboxy group-containing acrylic resin (a3) having an acid value X<SB>B< / SB>(mgKOH / g) of 180≤X<SB>B< / SB>≤450. COPYRIGHT: (C)2005,JPO&NCIPI

The invention provides an aluminum oxide sintered product which can be provided with volume resistivity adjusted between the coulombian and Johnson type and excellent corrosion resistance. The aluminum oxide sintered product of the invention is the sintered product with layer phase containing a rare-earth element and fluorine among grains of aluminum oxide serving as a main component, or a phase containing a rare-earth element and fluorine along edges of grains of aluminum oxide serving as a main component. Such an aluminum oxide sintered product includes a phase containing a rare-earth element and a fluorine element among grains of aluminum oxide, the phase not being in the form of localized dots but in the form of line segments, when viewed in an SEM image. An aluminum oxide sintered product according to the present invention can be readily adjusted to have a volume resistivity in the range of 1*10 <13> to 1*10<16> omega.cm, wherein the volume resistivity is calculated from a currentvalue after the lapse of 1 minute from the application of a voltage of 2 kV / mm to the aluminum oxide sintered product at room temperature.

Provided is ferritic stainless steel which has sufficient corrosion resistance and excellent formability and ridging resistance. The ferritic stainless steel contains, in mass%, 0.005-0.035% of C, 0.25% or more but less than 0.40% of Si, 0.05-0.35% of Mn, 0.040% or less of P, 0.01% or less of S, 15.5-18.0% of Cr, 0.001-0.10% of Al and 0.01-0.06% of N, with Si and Mn satisfying 29.5*Si - 50*Mn + 6 >= 0 (wherein Si and Mn represent the contents (mass%) of the respective elements), and with the balance made up of Fe and unavoidable impurities.

The invention discloses anhydrous refrigerating fluid for an internal combustion engine, and relates to the technical field of refrigerating fluid. The anhydrous refrigerating fluid is prepared from the following raw materials in percentage by mass: 85.53 to 95.0 percent of basic liquid, 1.2 to 3.0 percent of nano-particles, 1 to 3 percent of alkaline supplement agent, 0.75 to 1.47 percent of corrosion inhibitor, 0.5 to 2.0 percent of anti-foaming agent, and 2 to 5 percent of additive. A pH value is stabilized at 7.5 to 8.0; the basic liquid is prepared from mixed alcohol of ethylene glycol and propylene glycol; a nano-particle mixture is prepared from copper oxide nano-particles, silicon dioxide nano-particles and aluminum oxide nano-particles; the corrosion inhibitor is prepared from a mixture of sodium benzoate, heptanoic acid, toluene triazole, triazole, isooctanoic acid and diethylene glycol monomethyl ether. The anhydrous refrigerating fluid disclosed by the invention has high performance on comprehensive protection of multiple metals of an automobile cooling system; the complex type anhydrous refrigerating fluid has the advantages of good corrosion inhibitive ability, longlasting property, storage stability, high resistance to hard water, environmental friendliness and safety.

The invention provides a resin composition capable of accurately coating a base plate with metal layout height difference and meanwhile forming a screen film capable of keeping high photoelectric conversion efficiency and having excellent corrosion stability. Furthermore, the invention provides the resin composition for forming the screen film at low cost only using the relative simple steps suchas the coating step and the heating step and an electrode for a dye sensitization solar battery with the screen film with corrosion stability with excellent photoelectric conversion efficiency. The electrode for the dye sensitization solar battery comprises the screen film formed by the resin composition, characterized in that: the resin composition comprises [A] having copolymer with at least one reactivity function base selected from the groups composed of a carboxyl group, an epoxy group and (methyl) acryl group.

The invention relates to a low-melting-point and high-hardness lead-free solder and a preparation method thereof. The low-melting-point and high-hardness lead-free solder is prepared from the following raw materials in percentage by weight: 5 to 8 percent of Zn, 30 to 40 percent of Bi, 0.2 to 0.5 percent of Mg, 0.1 to 0.2 percent of In, 0.01 to 0.015 percent of grapheme, and the balance being Sn and inevitable impurities. According to the low-melting-point and high-hardness lead-free solder disclosed by the invention, by optimizing components of the raw materials and adding the Mg and the grapheme, the hardness of the solder is effectively improved, a melting point is reduced, and the solder is enabled to have good welding performance.

The present invention provides a corrosion prevention method for an aluminum-based metal component, which makes it easy to check the presence or absence of a chemically formed film on the component, and a corrosion-proof aluminum-based metal product produced by the method. In the method, the following treatment agent (A) is brought into contact with a surface of the aluminum-based metal component to chemically form the following film (B) on the surface of the aluminum-based metal component: (A) a treatment agent comprising an aqueous solution of zinc sulfate, an aqueous solution of ammonium fluoride and an aqueous solution of sodium molybdate which are mixed together; (B) a chemically formed film (B) comprising zinc fluoride, molybdenum and aluminum fluoride.

Provided are a ferrite-based hot-rolled stainless steel sheet and a hot-rolled annealed sheet that are adequately resistant to corrosion and are capable of inhibiting deflection and distortion following shaping. The ferrite-based hot-rolled stainless steel sheet contains 0.005-0060% by mass of C, 0.02-0.50% by mass of Si, 0.01-1.00% by mass of Mn, 0.04% or less of P, 0.01% or less of S, 15.5-18.0%by mass of Cr, 0.001-0.10% by mass of Al, 0.005-0.100% by mass of N, and 0.1-1.0% by mass of Ni, the remainder comprising Fe and inevitable impurities, and the absolute value of the in-plane anisotropy of the longitudinal modulus as calculated from formula (1) below being 35 GPa or less. the absolute value of [delta]E=the absolute value of (EL-28ED+EC) / 2 ... (1) (where EL is the longitudinal modulus (GPa) for the direction parallel to the rolling direction, ED is the longitudinal modulus (GPa) for the direction 45 degrees from the rolling direction, and EC is the longitudinal modulus (GPa) for the direction perpendicular to the rolling direction)

This heat exchanger tube is provided with: a tube main body configured from an aluminium alloy; and a coating film applied to the surface of the tube main body. The coating film includes a binder, and a mixed power including: at least 1 g / m<2> but not more than 7 g / m<2> of a Si powder; at least 0.2 g / m<2> but not more than 4.0 g / m<2> of a Zn powder; at least 0.5 g / m<2> but not more than 5.0 g / m<2> of a first flux powder configured from a Zn-containing compound; and at least 5 g / m<2> but not more than 20 g / m<2> of a second flux powder configured from a Zn-free compound. The total amount of the mixed powder in the coating film is not more than 30 g / m<2>. The proportion of the binder in the coating film is 5-40 mass%.

The invention provides a rare earth sintered magnet which is improved in corrosion resistance by oxidizing heat treatment to such a level as to exhibit satisfactory corrosion resistance even in an atmosphere of varying humidity and which is reduced in the deterioration of magnetic characteristics due to oxidizing heat treatment and a process for the production of the magnet. A surface-modified rare earth sintered magnet characterized in that the surface modified part is an at least three-layered surface modification layer which comprises a main layer containing R, Fe, B and oxygen, an amorphous layer containing at least R, Fe and oxygen, and an outermost layer containing hematite-base iron oxide as the main constituent in this order from the inside of the magnet; and a process for the production of the magnet, characterized by comprising the step of subjecting a magnet body to heat treatment in an atmosphere of oxygen partial pressure of 1 OE102 to 1 OE105Pa and water vapor partial pressure of 0.1 to 1000Pa (exclusive of 1000Pa) at 200 to 600 DEG C.

The invention relates to a copper radiator heat pipe with a film, which is characterized in that: the film of the copper radiator heat pipe is formed in the way of depositing the coating composite on the surface of the copper or copper base, wherein the coating composite comprises Ag, carbohydrazide compound, sulfonic group copolymer resin, alcohol and water. The copper radiator heat pipe with the film can ensure the full hydrophily and corrosion resistance.

The invention provides a two-pack type water-based anticorrosive coating composition which comprises a first component (I), which comprises a water-thinnable polyamine resin (A) and a rust-preventivepigment ingredient (B), and a second component (II), which comprises a water-thinnable epoxidized resin (C), wherein the water-thinnable polyamine resin (A) is a resin produced from an epoxy resin (a1) and a polyamine compound (a2) as starting materials and having a total amine value in the range of 20-120 mg-KOH / g, the rust-preventive pigment ingredient (B) includes, as some of the ingredient, arust-preventing pigment (b) capable of releasing ions of at least one kind selected from among magnesium ions, aluminum ions, calcium ions, zinc ions, silicate ions, phosphate ions, vanadate ions, andmolybdate ions, the rust-preventive pigment ingredient (B) is contained in an amount of 1-100 parts by mass per 100 parts by mass of the water-thinnable polyamine resin (A), and the water-thinnable epoxidized resin (C) has a lower weight-average molecular weight than the water-thinnable polyamine resin (A).

Provided are: a ferritic stainless steel which has sufficient corrosion resistance and formability (large elongation and average r value, and small |[delta]r|), while being suppressed in the occurrence of linear streaks and having excellent surface properties; and a method for producing this ferritic stainless steel. A ferritic stainless steel according to the present invention contains, in mass%, 0.005-0.05% of C, 0.02-0.50% of Si, 0.05-1.0% of Mn, 0.04% or less of P, 0.01% or less of S, 15.5-18.0% of Cr, 0.001-0.10% of Al, 0.01-0.06% of N, 0.01-0.25% of V, 0.001-0.020% of Ti and 0.001-0.030% of Nb, with the balance made up of Fe and unavoidable impurities. In addition, this ferritic stainless steel is configured to satisfy V / (Ti+Nb)>=2.0.

The invention provides a ferrite-series stainless steel cold-rolled steel plate and a manufacturing method thereof, wherein the ferrite-series stainless steel cold-rolled steel plate has advantages ofsufficient corrosion resistance, sufficient suppression of metal powder defects and excellent surface appearance. According to the manufacturing method of the ferrite-series stainless steel cold-rolled steel plate, hot rolling is performed on a steel raw material with specified components for manufacturing a hot-rolled steel plate; hot-rolled plate annealing, shot blasting processing and acid pickling are successively performed on the hot-rolled steel plate; and then cold rolling and cold-rolled plate annealing are performed. In the manufacturing method, the heating temperature in hot-rolledsteel plate annealing is set to 800-900 DEG C; the keeping time is set to 1-24 hours; collosion energy in shot blasting processing is set to 10-40kJ / m<2>; and furthermore the average particle diameterof the shot blasting particles in shot blasting processing is set to 0.2-1.0mm; and the hardness is set to HV350-550 according to a Vickers hardness tester.

The aqueous coating composition comprises an acrylic-modified epoxy resin (1), a basic compound, and an aqueous medium. Here, the acrylic-modified epoxy resin (1) is obtained by reacting part of the epoxy groups of an epoxy resin (a1) with part of the carboxy groups of a carboxy group-containing acrylic resin (a2) having an acid value X[a](mgKOH / g) of 10<=X[a]<=135, a glass transition temperature Tg (DEG C) of -20<=Tg<=20, and a weight average molecular weight Mw of 10,000<=Mw<=200,000 and a carboxy group-containing acrylic resin (a3) having an acid value X[B](mgKOH / g) of 180<=X[B]<=450. The aqueous coating composition excels in water resistance, has sufficient processability, and slip properties at the same time when used as a can coating, particularly a lid coating, and can form a coating film having both flavor properties and adhesion when used as an inner surface coating for a bottomed cylindrical member.

This invention provides a film magnetic head having a protection film at least at the surface opposite to the recording medium, in which, the protection film is expressed by a formula: SiCxHyOzNw, in which, X, Y, Z and W express the atomic ratio, X=3-26, Y=0.5~13, Z=0.5~6, W=0~6, its thickness is 1~3nm, its refractive power is 2.0 or over. This invention also provides a method for manufacturing the protection film and a film head by applying negative bias.

An eye drop composition which contains a quaternary ammonium salt in a reduced amount and, despite this, has a sufficient antiseptic effect. The composition contains nipradilol as a medicinal ingredient and is characterized by containing 0.0005 to 0.005% by mass cationic surfactant which is a quaternary ammonium salt.

The present invention provides: a ferrite stainless hot-rolled-and-annealed steel sheet that is excellent for punching, has substantial corrosion resistance, and makes it possible to achieve a prescribed dimensional precision without cracking when punched into a thick flange; and a production method for the ferrite stainless hot-rolled-and-annealed steel sheet. A ferrite stainless hot-rolled-and-annealed steel sheet that has a ferrite single phase structure that has a component composition that contains, by mass%, 0.001%-0.020% of C, 0.05%-1.00% of Si, 0.05%-1.00% of Mn, no more than 0.04% of P, no more than 0.01% of S, 0.01%-0.10% of Al, 10.0%-20.0% of Cr, 0.50%-2.00% of Ni, 0.10%-0.40% of Ti, and 0.001%-0.020% of N, the remainder being Fe and unavoidable impurities, the average crystal grain size of the metal structure of the ferrite single phase structure being 5-20 microns.

The invention provides a method for chemical conversion treatment by which a chemical conversion layer attaining satisfactory substrate-covering properties, adhesion to coating and corrosion resistance can be formed on any metal structure surface. A method for chemical conversion treatment by treating a metal structure with an agent for chemical conversion treatment, wherein the agent contains zirconium, fluorine, an amino -containing alkoxysilane, and a hydroxyl-containing alkoxysilane with the contents of zirconium and the amino-containing alkoxysilane being 100 to 700ppm in terms of metal and 50 to 500ppm in terms of solid matter respectively at a fluorine / zirconium molar ratio of 3.5 to 7.0 and has a pH of 2.8 to 4.5.

An electrically conductive flow-field plate in a proton exchange membrane fuel cell comprises a composition made of a resin and a plurality of carbon nanotubular fibers having an average diameter is at least about 0.5 nm and up to about 300 nm. The carbon nanotubular fibers are present at not more than about 85 wt. %. The resin can be of a thermoplastic type, a fluorinated type, a thermosetting type and a liquid crystalline type.

The present invention provides a two-component water-based anticorrosion coating composition, which comprises: the first component (I) containing water-dilutable polyamine resin (A) and antirust pigment component (B), and containing water-dilutable The second component (II) of epoxy-based resin (C); the water-dilutable polyamine resin contains epoxy resin (a1) and polyamine compound (a2) as raw materials for manufacture and has 20 to 120 mgKOH / Resin with a total amine value of g; the antirust pigment component partly includes antirust pigment (b), and the antirust pigment can dissolve and be selected from magnesium ions, aluminum ions, calcium ions, zinc ions, silicate ions, phosphoric acid At least one ion among radical ions, vanadate ions and molybdate ions; based on 100 parts by mass of the water-dilutable polyamine resin, the antirust pigment component accounts for 1 to 100 parts by mass; and the water-containing The weight-average molecular weight of the dilutable epoxy-based resin is lower than that of the water-dilutable polyamine resin.

The invention provides a repair agent and repair method for a plated base, as well as a plated base. Disclosed is a repair agent for a plated base including a plating layer which is disposed on a surface of a metal base and which includes a metal with a stronger tendency to ionization than metal comprising the metal base, the repair agent including a phosphoric acid compound and a phosphonic acidcompound.

A non-luminal area implant with improved corrosion resistance, and a manufacturing method thereof are provided. (1) A magnesium alloy surface having a prescribed shape is fluorinated to form a fluorinated layer and a parylene layer is formed on the fluorinated layer to form this non-luminal area implant, which, on the magnesium alloy surface, has (a) a magnesium fluoride layer and (b) a parylene layer. (2) In a manufacturing method of this non-luminal area implant, (a) a magnesium alloy surface having an arbitrary shape is fluorinated to form a magnesium fluoride layer, and thereafter, (b) a para-xylylene resin is vapor deposited on the magnesium fluoride layer to form the parylene layer.