49results about How to "Improves electrochemical corrosion resistance" patented technology

The invention discloses a rust-proof aluminum alloy, which not only comprises 51 to 97.95 weight percent of aluminum, 0.01 to 2 weight percent of manganese, 0.01 to 2 weight percent of magnesium, and 0.01 to 3 weight percent of copper, but also comprises 1 to 19 weight percent of chromium, 0.01 to 9 weight percent of nickel, 0.01 to 4 weight percent of silicon, and 1 to 47.95 weight percent of aluminum oxide. The aluminum oxide forms a corundum-like substance in an aluminum alloy body to obviously improve the overall corrosion resistance and wear resistance of the aluminum alloy.

The invention belongs to the technical field of electric double layer capacitor manufacturing, and relates to an electrode plate of an electric double layer capacitor (EDLC) and a preparation method thereof. According to the electrode plate of the EDLC and the preparation method thereof, conductive carbon granules are embedded in one surface or two surfaces of a current collector, and the surface is bonded with electrode material through conductive adhesive; the electrode material is formed by electrode active substance, conductive agent and adhesive agent; the conductive adhesive is formed by conductive agent and rubber, and the rubber is capable of preventing current collector from being corroded electrochemically in electrolyte; and the current collector is made of aluminum foil as thick as 20um-30um, and the conductive carbon granules are embedded on the surface of the current collector with a high purity graphite bar by means of electrical spark discharge. The electrode active substance is active carbon like asphalt base ball, the specific surface area of the electrode active substance is larger than or equal to 2000m<2>/g, the grain size is 10um-23um, and the bore diameter is 1nm-3nm. By means of the electrode plate of the EDLC and the preparation method thereof, internal resistance of the EDLC is decreased, the electrochemical corrosion resistance of the EDLC current collector is improved, service life of the EDLC is prolonged, and working voltage is stabilized.

Certain example embodiments of this invention relate to techniques for laser ablating/scribing peripheral edges of a coating (e.g., a low-emissivity, mirror, or other coating) on a glass or other substrate in a pre- or post-laminated assembly, pre- or post-assembled insulated glass unit, and/or other product, in order to slow or prevent corrosion of the coating. For example, a 1064 nm or other wavelength laser may be used to scribe lines into the metal and/or metallic layer(s) in a low-emissivity or other coating provided in an already-laminated or already-assembled insulated glass unit or other product, e.g., around its periphery. The scribe lines decrease electron mobility from the center of the coating to the environment and, thus, slow and sometimes even prevent the onset of electrochemical corrosion. Associated products, methods, and kits relating to same also are contemplated herein.

The invention discloses a graphitized carbon carrier for a hydrogen fuel cell, a preparation method of the graphitized carbon carrier and a cell catalyst of the graphitized carbon carrier. The preparation method comprises the following steps: pretreating the carbon carrier; dispersing and anchoring transition metal ions, adding transition metal salt, auxiliaries and the like in the process, and performing ultrasonic stirring; carrying out catalytic graphitization on the carbon carrier, and keeping the temperature between 700 DEG C and 1000 DEG C; and catalytically purifying the graphitized carbon carrier. According to the graphitized carbon carrier for the hydrogen fuel cell, the auxiliaries are added in the preparation process of the carbon carrier, metal ions are assisted to be more uniformly dispersed on the surface of the carbon carrier, the uniformity of the catalytic graphitization degree of the surface of the carbon carrier is further improved, the electrochemical corrosion resistance of the carbon carrier is improved, and the durability of a catalyst is enhanced; and the auxiliary agent is converted into a carbon-containing substance in the heating process and serves as a physical barrier to hinder agglomeration and growth of metal particles. According to the carbon carrier, the graphitization temperature of a carbon material is remarkably reduced, the technical index of high-temperature roasting equipment is reduced, and the uniformity of the graphitization degree of the surface of the catalytic graphitization carbon carrier is better.

The embodiment of the invention provides an enhancement core of a fiber-reinforced copper-based composite material contact line. The enhancement core is composed of copper alloy wires and carbon fiber bundles. The enhancement core axially comprises a plurality of repeated feature circulation segments. The radial section of each feature circulation segment comprises a substructure formed by arranging one or more carbon fiber bundles and one or more copper alloy wires in a staggered manner. Due to the fact that the carbon fiber has the beneficial effects of being large in tensile strength, high in modulus and the like, the enhancement core has the larger tensile strength, potential difference does not exist between the carbon fiber and copper or between the carbon fiber and added alloy elements, the whole corrosion resistance of the contact line can be improved, and the enhancement core has the higher electrochemical corrosion resistance performance.

The invention discloses a heat treatment method for pre-aging, re-solid-solution and re-aging of an Al-Cu-Li alloy, belongs to the field of material heat treatment, and aims to perform conventional solid-solution, pre-aging, re-solid-solution and re-aging treatment on an Al-Cu-Li alloy extruded plate by controlling a heat treatment process system and parameters thereof. The conventional solid solution and re-solid solution treatment temperature is 515 +/-10 DEG C, heat preservation is performed for 60-90 min, then water quenching is performed, and the quenching transfer time is shorter than 5s. The pre-aging and re-aging treatment temperature is 160-180 DEG C, heat preservation is performed for 24-48 hours, and the product is taken out for air-cooling. The strength of the alloy can be reduced through re-solid-solution treatment, the plasticity of the alloy is improved, and correction and reprocessing processes are facilitated. The re-aging treatment can effectively regulate and control the variety, density and distribution of precipitated phases, thereby enhancing the strength of the alloy. In addition, due to coarsening of discontinuous grain boundary precipitated phases in the alloy and increasing of the copper content, on the premise that the strength of the alloy is basically not lost, the stress corrosion resistance, the intergranular corrosion resistance and the electrochemical corrosion resistance are improved, and the plasticity of the alloy is improved. The process is simple and feasible and is not limited by the thickness of the plate.

The invention discloses a method for improving electrochemical corrosion resistance of conductive carbon black, which comprises the following two steps: step 1, mixing the conductive carbon black with an alcohol solvent, and stirring for a period of time to enable the conductive carbon black to be uniformly dispersed in the alcohol solvent; and 2, irradiating the conductive carbon black alcoholic solution by using non-focused pulse laser, and stirring the solution in the irradiation process. Compared with initial conductive carbon black, the conductive carbon black subjected to laser irradiation treatment has lower corrosion current under the condition of high potential and shows higher electrochemical corrosion resistance, and the method is simple, quick, efficient and easy for batch production, has a wide application prospect in the field of proton exchange membrane fuel cell catalysts, and further has a wide application prospect in the field of proton exchange membrane fuel cell catalysts. The application field of the liquid-phase laser irradiation technology is expanded, and meanwhile, a new design thought is provided for improving the electrochemical corrosion resistance of the conductive carbon black.

The invention relates to a method for forming a high-strength high-toughness high-corrosion-resistance copper-based alloy by selective laser melting. The method is characterized by comprising the following steps: (1) slicing a copper-based alloy part CAD (Computer-Aided Design) model layer by layer, and generating a series of selective laser areas to melt and form a two-dimensional scanning track according to slice contour information; and (2) stacking the special copper-based alloy powder point by point, line by line and layer by layer to form a three-dimensional solid copper-based alloy by adopting a selective laser melting method according to the generated scanning track. The copper-based alloy prepared by adopting the selective laser melting method has a biphasic heterogeneous microstructure, so that structural performance integrated design and manufacturing of the high-strength high-toughness high-corrosion-resistance copper-based alloy can be realized in one step; and the problems that a conventional method such as multi-pass rolling after fusion casting is complex in process, multi-step forming exists, and personalized and flexible manufacturing cannot be met are solved.

The invention relates to a wear-resistant electrician bag for power systems, which comprises a bag body, a shoulder strap and a waist strap, the bag body consists of an internal wear-resistant layer, a non-woven fabric layer, a waterproof layer and an external wear-resistant layer from the inside to the outside, the internal wear-resistant layer is made of a thin thermoplastic elastic rubber layer, the waterproof layer is a polyvinyl chloride waterproof layer, and the material components of the external wear-resistant layer are as follows: 40 to 60 parts by weight of styrene-butadiene rubber, 20 to 40 parts by weight of chloroprene rubber, 23 to 26 parts by weight of fluoroether rubber, 0.1 to 15 parts by weight of graphene, 13 to 15 parts by weight of phenol-formaldehyde resin, 1 to 10 parts by weight of silane coupling agent, 12 to 15 parts by weight of semi-reinforcing furnace black, 10 to 12 parts by weight of calcined clay, 1 to 5 parts by weight of magnesium powder, 5 to 7 parts by weight of nanometer molybdenum disulfide (MoS2), 1 to 10 parts by weight of anti-aging agent, 4 to 8 parts by weight of zinc oxide and 1 to 5 parts by weight of accelerant. Besides high wear resistance, the electrician bag also has the characteristics of dampproofness, light weight, wear resistance, high temperature resistance, weather resistance and high insulating property.

Certain example embodiments of this invention relate to techniques for laser ablating/scribing peripheral edges of a coating (e.g., a low-emissivity, mirror, or other coating) on a glass or other substrate in a pre- or post-laminated assembly, pre- or post-assembled insulated glass unit, and/or other product, in order to slow or prevent corrosion of the coating. For example, a 1064 nm or other wavelength laser may be used to scribe lines into the metal and/or metallic layer(s) in a low-emissivity or other coating provided in an already-laminated or already-assembled insulated glass unit or other product, e.g., around its periphery. The scribe lines decrease electron mobility from the center of the coating to the environment and, thus, slow and sometimes even prevent the onset of electrochemical corrosion. Associated products, methods, and kits relating to same also are contemplated herein.

The invention discloses an environment-friendly passivation solution for an aluminum alloy. The environment-friendly passivation solution for the aluminum alloy is characterized by comprising the following components in percentage by mass: 0.05 to 0.11 percent of potassium hexafluorohafnium oxide, 0.03 to 0.05 percent of sodium fluoborate, 0.06 to 0.13 percent of amphoteric organic ion trimethoxysilylpropyl polyurethane polymer, 0.01 to 0.02 percent of modified rare earth metal organic framework and the balance of water. The invention further discloses a preparation method of the environment-friendly passivation solution for the aluminum alloy. The environment-friendly passivation solution for the aluminum alloy disclosed by the invention is remarkable in passivation effect, high in stability, uniform and compact in passivation film, high in corrosion resistance, good in environmental protection property, high in adhesive force and good in film forming property.

The invention discloses a high-pressure-resistant and corrosion-resistant remote transmission differential pressure sensor. The sensor comprises a cylinder, wherein the two ends of the cylinder are open; the cylinder cover is fixed at the top of the cylinder body; the cylinder bottom is fixed at the bottom of the cylinder body; the measuring assembly is arranged in the cylinder body and is fixedly connected with the cylinder bottom; the two pressure tapping accessories are located on the two sides of the cylinder respectively and connected with the two pressure measuring ends of the measuring assembly. The pressure tapping accessory comprises a mounting flange, a diaphragm and a protective cover; the diaphragm is fixed on the surface of the mounting flange, the protective cover is fixedly connected with the mounting flange, and the diaphragm is arranged in the protective cover; a plurality of through holes are formed in the surface of the protective cover; the capillary tube is wrapped with a layer of protective sleeve; the two capillary tubes are connected to the two pressure measuring ends of the measuring assembly respectively. One end of the capillary tube penetrates through the side wall of the cylinder and is fixedly connected with the pressure measuring end of the measuring assembly, and the other end is fixedly connected with the diaphragm. The pressure difference sensor can be used for deep sea operation, has high pressure resistance and corrosion resistance, and is accurate in measured data.