41results about How to "Poor corrosion resistance" patented technology

A multilayer radiant-barrier structure is formed on one or both sides of a substrate that can be attached to an insulating layer to produce a reflective insulating material. The metallized layer is protected from environmental degradation without interfering with flammability properties that are critical for radiant and reflective insulation materials used in housing applications. The metal layer is modified to insulate enclosures without blocking cellular communications and the protective functional layer in modified to minimize emissivity, create a hydrophobic and/or oleophobic surface, and/or prevent mold, fungi and bacteria growth. Solutions are provided to solve occupational-hazard problems associated with the use of these materials in enclosures that include power wires.

A three-piece combined oil-control ring comprises a pair of upper and lower side rails 222 in the axial direction and a spacer expander 224. The spacer expander is located between the side rails 222, and pushes the side rails from their inner peripheral side to generates the tension of the side rails 222. The ears of the spacer expander made of austenitic stainless steel in contact with inner peripheral surfaces of the side rails, are subjected to gas-nitriding at a temperature of 470° C. or higher to form a 10 to 60 μm thick gas-nitriding surface-layer comprising a phase having peaks at 2θ=40° and 2θ=46° by Cu—K α X-ray diffraction. In addition or alternatively, a resin coating film (31) is formed on at least surfaces of the spacer expander (7) faced to the side surfaces of the side rails or on at least surfaces of the side rails (5,6) faced to the spacer expander (7).

The present invention relates to a steel rebar comprising the following ingredients: 0.005%-0.030% of C, 0.3%-0.6% of Si, 1.2%-2.5% of Mn, 0.01% or less of P, 0.01% or less of S, 8.0%-10.0% of Cr, 1.0%-3.0% of Mo, 0.2%-0.4% of Sn, 0.01%-0.05% of Rare Earth element, and the remainder being Fe and unavoidable impurities. The present invention also provides a production method of steel rebar. The steel rebar of the present invention has excellent comprehensive mechanical properties and corrosion resistance performance, while meeting the requirements of anti-knock, the service life in sea water of the steel rebar is increased, thus it can be widely used in reinforced concrete structures in ocean environment.

A tailored blank for hot stamping includes a welded portion formed by butt-welding a first aluminum-plated steel sheet and a second aluminum-plated steel sheet, an Average Al concentration of a weld metal in the welded portion is in a range of 0.3 mass % to 1.5 mass %, an Ac₃ point of the weld metal is 1250° C. or lower, and furthermore, an aluminum layer formed during the butt-welding is present on a surface of the welded portion.

A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.

A high-strength aluminum alloy extruded material contains Si: 0.70 to 1.3 mass %; Mg: 0.45 to 1.2 mass %; Cu: 0.15 to less than 0.40 mass %; Mn: 0.10 to 0.40 mass %; Cr: more than 0 to 0.06 mass %; Zr: 0.05 to 0.20 mass %; Ti: 0.005 to 0.15 mass %, Fe: 0.30 mass % or less; V: 0.01 mass % or less; the balance being Al and unavoidable impurities Crystallized products in the alloy have a particle diameter of a is 5 μm or less. Furthermore, an area ratio of a fibrous structure in a cross section parallel to an extruding direction during hot extrusion is 95% or more.

The invention provides a method for preparing a thick type shaving board through waste outdoor heat-treated wood and conventional wood. The thick type shaving board prepared through the method is small in hygroscopicity, stable in size and good in comprehensive mechanical property. According to the method, the waste outdoor heat-treated wood and the conventional wood are crushed into wood shavings respectively, and the two wood shavings are dried until the moisture content is 2%-4%, and then sizing and stirring are conducted; the wood shavings are made into a board blank through mat formation and are formed through hot pressing; when the mat formation is conducted, the wood shavings of the waste outdoor heat-treated wood are paved in a sandwich layer of the board blank, and the wood shavings of the conventional wood are paved in a surface layer of the board blank; in the sizing process, the adhesive is a urea-formaldehyde resin adhesive, or a phenolic resin adhesive, or a isocyanate adhesive; in the hot pressing process, the hot pressing pressure is 2.5-3.5 Mpa, the hot pressing time is 0.2-0.5 min/mm, and if the urea-formaldehyde resin adhesive is used, the hot pressing temperature is 110 DEG C to 160 DEG C; and if the phenolic resin adhesive or the isocyanate adhesive is used, then the hot pressing temperature is 150 DEG C to 200 DEG C.

A manufacturing method of a fuel cell separator is provided, whereby the adhesion of a carbon film against a titanium base substrate can be improved and favorable corrosion resistance can be obtained at the same time. A fuel cell separator having such improved adhesion and favorable corrosion resistance is also provided.

The method for manufacturing a fuel cell separator according to an embodiment of the invention includes the steps of: forming a TiOx (1<x<2) layer 42 on a titanium base substrate 40; and forming a carbon film 44 on the TiOx layer 42 by plasma CVD so that a binder layer 43 including Ti, O and C is formed between the TiOx layer 42 and the carbon film 44.

A task of the present invention is to provide a Ti—Mo alloy material which can be improved in the yield stress at room temperature by the precipitation of an aged omega phase in the Ti—Mo alloy while maintaining large ductility at room temperature, and a method for producing the same.

Provided is a Ti—Mo alloy collectively having an Mo content of 10 to 20 mass %, wherein the Ti—Mo alloy has a winding belt-like or swirly segregation portion having a width of 10 to 20 μm in the plane of a backscattered electron image (BEI) or an energy dispersive X-ray spectroscopy (EDS) image of the Ti—Mo alloy, as examined under a scanning electron microscope, in which Mo content is larger than the collective Mo content of the Ti—Mo alloy. When generally observing the entire plane examined, a segregation structure in a swirly form can be observed.

Further, provided is the Ti—Mo alloy which has been subjected to aging treatment so that an aged omega phase is precipitated along the segregation portion. When generally observing the entire plane examined, an aged omega phase structure in a swirly form can be observed.

An injector having a tube attached to an armature. The injector includes a solenoid portion and a valve portion controlled by the solenoid portion. The armature includes a small diameter portion. Also included is a tube having a cavity, a first end of the tube is connected to the small diameter portion, and a ball is connected to a second end of the tube, such that the ball is selectively in contact with a valve seat. A hermetic weld connects the ball to the second end, and at least one heat affected zone is located in proximity to the hermetic weld. A coating substantially surrounds the heat affected zone and at least a portion of the ball, such that the coating prevents the heat affected zone from being exposed to diesel exhaust fluid and thus subsequent corrosion.

An electrolytic cell for aluminum electrolysis includes a cell body, in which an anode and a cathode are arranged inside the cell body, the cell body is filled with an electrolyte, and at least a part of the anode is immersed in the electrolyte; the anode is arranged above the cell body, the cathode is arranged at the bottom of the electrolytic cell and is covered by aluminum liquid, the electrolyte is located between the anode and the cathode and covers the aluminum liquid; and an insulating layer is arranged on the inner sidewall of the cell body for isolating oxygen or the electrolyte from a carbon block. The anode contains Fe and Cu as primary components; and the electrolyte is composed of 30-38 wt % of NaF, 49-60 wt % of AlF₃, 1-5 wt % of LiF, 1-6 wt % of KF and 3-6 wt % of Al₂O₃, and the molar ratio of NaF to AlF₃ is 1.0-1.52.

The invention discloses wallboard binder and a preparation method thereof. The wallboard binder comprises cellulose ether, water and cement, wherein the weight ratio of the cellulose ether to the water to the cement is (0.1-3):(610-640):1000. The preparation method includes: loading the water into a stirring barrel according to the weight, placing the cellulose ether into the stirring barrel, and stirring with a stirrer for 150-180 seconds until liquid is thick; adding the cement, and stirring with an electric stirrer for 150-180 seconds to obtain the wallboard binder. The wallboard binder and the preparation method thereof have the advantages that the wallboard binder only comprises three components, the cellulose ether and the cement are powdered and do not form granules after mixing, the binder is fine and smooth and lubricating in surface and good in binding performance, the preparation method can replace a tradition method which needs multiple components to jointly prepare the binder, unevenness during binder smearing can be avoided, and manpower cost increasing can be avoided.

The invention discloses a processing process of an aluminum veneer. The processing process comprises the following steps of pretreatment: carrying out primary rough grinding and secondary fine grinding on the aluminum veneer through sand paper, washing the aluminum veneer completely, spraying an oil removing agent after the aluminum veneer is drained, washing and drying the aluminum veneer after removing oil, soaking the aluminum veneer in a pickling solution, and washing and draining the aluminum veneer after pickling; chromium-free passivation: putting the drained aluminum veneer into a passivation solution, washing with water, dipping in a solution containing phytic acid, cleaning with deionized water, and drying; and spraying: spraying a fluorocarbon coating primer on the surface of the passivated aluminum veneer by using a high-voltage electrostatic spray gun, placing at a low temperature for leveling, continuously uniformly spraying a fluorocarbon coating finish paint by using the high-voltage electrostatic spray gun, placing at a low temperature for leveling, continuously uniformly spraying a fluorocarbon coating varnish by using the high-voltage electrostatic spray gun, placing at a low temperature for leveling, and then drying to finish processing. The processing process of the aluminum veneer has the advantages of better corrosion resistance and higher stability.

An all-electric pressure washer heater module having a heating coil and a heating element is disclosed. A system for all-electric pressure washing is further disclosure. In particular, the all-electric pressure washer heater module contains the heating element from exposure to corrosion and fouling.

The anticorrosion treatment method of the invention is carried out on the outer surface of an aluminum extruded heat exchange tube which is formed of an Al alloy containing Mn 0.2 to 0.3 mass %, Cu 0.05 mass % or less, and Fe 0.2 mass % or less, and which has a wall thickness of 200 μm or less. The anticorrosion treatment method includes applying a specific dispersion of a flux powder and a Zn powder onto the outer surface of the heat exchange tube, and vaporizing a liquid component of the dispersion, to thereby deposit the Zn powder and the flux powder on the outer surface of the heat exchange tube, such that the Zn powder deposition amount, the flux powder deposition amount, and the ratio of the flux powder deposition amount to the Zn powder deposition amount are adjusted to specific values.

An inert alloy anode for aluminum electrolysis contains Fe and Cu as primary components and further contains Sn; addition of the metal Sn contributes to formation of an oxide film with strong oxidization resistance and stable structure on the surface of the inert alloy anode and to improvement of the corrosion resistance of the anode; on this basis, the inert alloy anode further contains Ni, Al and Y, addition of the metal Al can prevent the primary metal components from being oxidized, and addition of the metal Y can control alloy to present a desired crystal form in the preparation process to achieve oxidization resistance.