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.

This invention aims to provide a recycled magnesium alloy having a good corrosion resistance and a process for producing the same. The process of the present invention comprises an adjusting step of adjusting composition of molten metal of a magnesium alloy so as to comprise, by mass: Al: 5 to 10%, Zn: not less than 1% and not less than three times of Cu content (%), Mn: 0.1 to 1.5% and the remainder: Mg and impurities with or without one or more reforming elements. While the upper limit of the Al content is restricted to a low level, the Zn content is increased in accordance with the Cu content. Therefore, the recycled magnesium alloy produced by this process can effectively suppress corrosion caused by Cu, which is one of corrosion-causing elements.

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.

The hard carbon coating-clad base material of the present invention comprises a base material, a substratal metal coating formed on the base material by a wet plating process, an intermediate metal coating comprising a titanium or chromium coating formed on the substratal metal coating by a dry plating process and a silicon coating formed on the titanium or chromium coating by a dry plating process, and a hard carbon coating formed on the silicon coating by a dry plating process. According to the present invention, a highly reliable hard carbon coating which is excellent in corrosion resistance, adhesion and abrasion resistance can be formed even on brass or an iron base material having poor corrosion resistance, such as SK steel and martensitic and ferritic stainless steels.

The invention discloses a chemical plating Ni-P alloy technology of glass micro beads. A common chemical plating nickel liquid formula is adopted, the temperature is controlled to be 50-60 DEG C in the chemical plating nickel process, the plating application time is 30 minutes, and finally the chemical plated Ni-P alloy of glass micro bead with an even Ni-P deposition layer is obtained. After chemical plating, the contents of surface elements O and Si of the micro beads are lowered, but the contents of Ni and P are maximum, wherein the content of Ni reaches 58.76-68.41wt%, and the content of P reaches 8.87-10.04wt%. Compared with the chemical plating Ni-P alloy technology in the prior art, the content of Ni on the surface of the micro beads of the technology optimized by the invention is improved by 21.68-31.33wt%, and the content of P is improved by 8-9wt% compared with those of the technology which is not optimized.

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 sandstone high-strength high-brittleness similar material and a preparation method thereof. Raw materials comprise quartz sand, silicon powder, cement, distilled water and a water reducer. based on physical and mechanical properties and microscopic features of protolith, a method of regulating material properties by using aggregate is adopted, quartz sand is selected to improve brittleness of the material, and silicon powder is selected to raise strength of the material. Thereby, brittleness and strength of the sandstone similar material are achieved, and main physicaland mechanics parameters (density, elastic modulus, cohesion, internal friction angle, uniaxial compressive strength, tensile strength and Poisson's ratio, etc.) of the similar material and protolithmeet the similarity theory. Features of sandstone in rock slope of Xinjiang Tianshan highway are successively simulated. The types of required materials are less, and the cost is low. The manufactureefficiency is high. The material of the invention has wide practicality.

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 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 exemplary plastic component includes a polymer base, a metallic luster layer formed on the polymer base, and a diamond-like carbon layer formed on the metallic luster layer. The metallic luster layer is comprised of a material selected from the group consisting of silicon nitride, silicon carbide, titanium carbide, and a combination thereof. A thickness of the metallic luster layer is in the range from 50 nm to 1000 nm. The diamond-like carbon layer has a thickness in the range from 5 nanometers to 50 nanometers.

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 present invention provides a method for coating an aluminum wheel using a coating composition capable of forming a coating film having a superior cosmetic property as well as an anticorrosive property much enough for preventing corrosion even in the use in an area where the coating film is susceptible to salt damage, and an aluminum wheel obtained by the method. A method for coating an aluminum wheel including applying an anticorrosive coating composition onto the aluminum wheel, and thereafter applying a clear coating composition to form a transparent multilayer coating film, wherein the anticorrosive coating composition contains an acrylic resin (1) having a weight average molecular weight of 50,000 to 140,000, a glass transition point of 20 to 50° C., a hydroxyl value of 10 to 50 mgKOH / g, and an acid value of 10 to 40 mgKOH / g, and an epoxy resin (2) having an epoxy equivalent of 210 to 1,000 g / eq and contains the epoxy resin (2) in an amount of 5 to 20 parts by weight on the solid matter basis to 100 parts by weight of the solid matter of the acrylic resin (1).

The invention relates to the field of building materials, in particular to a non-cement-based sandy arsenic rock unburned brick effectively utilizing arsenic rock and used for controlling water and soil loss of the arsenic rock and a preparation method thereof. The brick is prepared from the arsenic rock, an active blending material, an activator and water, a main material, the active blending material and the activator are weighed by weight and put into a cement paste mixer to be mixed and stirred uniformly, then water is added, stirring is carried out for 90 seconds, pressure molding is carried out after uniform stirring is carried out, the wet density of a molded module after forming and demolding is no less than 1950 kilograms per cubic meter, maintenance is carried out for 28 days ina natural state, and the non-cement-based sandy arsenic rock unburned brick of which the compressive strength is 10-20 MPa is obtained.

To provide a light-weight resin member, for a valve, which has high strength and can be used in a high-temperature atmosphere, and is also excellent in chemical resistance and corrosion resistance.A resin member for a valve, which is produced by molding a molding material having a tensile strength of 80 to 400 MPa at normal temperature, and a resin member for a valve, which is produced by molding a molding material having a tensile strength of 75 to 350 MPa at 120° C. are disclosed. There is also disclosed a resin member for a valve, which is produced by molding a molding material comprising a resin composition containing an epoxy acrylate resin (A) having a hydroxyl value of 60 to 100, a polyisocyanate compound (B) having 0.1 to 1.5 isocyanate groups per one hydroxyl group of the epoxy acrylate resin (A), a curing agent (C) and an internal mold release agent (D), and 20 to 70% by weight of a fiber reinforcing material (E).

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.

The invention relates to the field of steel pipe preparation, and discloses a steel pipe processing method with a high yield. The continuous casting billet is used as a raw material, and the following steps are followed in sequence: heating, piercing, surface machining, annealing, pickling, phosphating, and saponification , Rolling preheating, rolling, cooling, the steel pipe produced will not crack, the quality is high, the yield is high, and the production cost is low; the piercing temperature is related to the piercing rate and the cracking degree of the steel pipe, and the appropriate piercing temperature can ensure the piercing efficiency. Avoid cracking of the steel pipe, and also avoid the production of waste products. The annealing process of the present invention can overcome the defect that the inner or outer surface of the steel pipe is easy to crack. Since the steel pipe billet is first put into the furnace and kept at 750-760°C, the steel pipe and The temperature in the furnace is consistent, and then staged annealing treatment and cooling are performed to stabilize the performance of the tube billet.

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.

Disclosed is a method of applying a zinc complex film, including forming a zinc complex film on a surface of a substrate, performing high-frequency curing at about 90˜110° C. for about 18˜22 min, and performing painting and drying as post-treatment. Further disclosed are a method of coating a brake caliper using the zinc complex film, and to a brake caliper thus coated.

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.