350results about How to "Strong corrosion resistance" patented technology

The invention relates to the field of aluminum alloy surface treatment, in particular relates to an environmentally-friendly corrosion-resistant chromium-free chemical conversion liquid and an application thereof in an environmentally-friendly corrosion-resistant chromium-free chemical conversion film with aluminum alloy coating adhesion for ships, and solves the problems of incapability of meeting the requirements on corrosion resistance and coating adhesion in the current environmentally-friendly chemical conversion treating process. The prepared chemical conversion film has excellent corrosion resistance and coating adhesion, is convenient in construction and can be used for substituting for a traditional chromium-containing chemical conversion and phosphate treatment process. The environmentally-friendly corrosion-resistant chromium-free chemical conversion liquid mainly comprises the components of silane, corrosion inhibition components and a solvent. The chromium-free chemical conversion film construction modes comprise dipping, roller painting and spraying, and the curing modes comprise natural curing and heating curing. The environmentally-friendly corrosion-resistant chromium-free chemical conversion film in the invention has excellent corrosion resistance and coating adhesion, can be used for substituting for a traditional chromium-containing chemical conversion and phosphate treatment process, and is applicable to aluminum alloys for ships such as 5xxx and 6xxx series aluminum alloys.

The invention relates to electrolysis solution and a preparation method thereof as well as a preparation method for an obtained aluminum capacitor. The electrolysis solution is composed by the components according to the following weight by parts: 38.5-85.7 wt % of primary solvent, 5-25 wt % of auxiliary solvent, 4-20 wt % of solute, 5-15 wt % of modified additive, 0.2-1 wt % of hydrogen eliminating agent and 0.1-0.5 wt % of waterproof combination agent. The primary solvent is glycol; the auxiliary solvent is one or more of tributyl phosphate, mono butyl ester phosphate, diglycol dibutyl ether; the solute is one or more of ammonium sebacate, 1.6-dodecyl ammonium bisgallic acid, 1.10-dodecyl ammonium bisgallic acid organic carboxylate. In the preparation method for the aluminum capacitor using the electrolysis solution, positive pressure and vacuum-pumping is required to be applied in an impregnation tank in an alternate recycle way with the recycle impregnation interval period being 20-60min.The electrolysis solution has the characteristics of high temperature resistance, high sparking pressure and strong corrosion resistance. The screw large capacitor has a service life of 8,000 hours at 105 DEG C or 2,000 hours at 125 DEG C.

The invention discloses a test bench device of quasi three-dimensional visualization models with high geostress and comprises a reaction wall device, a door-typed reaction frame is arranged in the side periphery of the reaction wall device, a hydraulic loading device is arranged between the door-typed reaction frame and a model body, and a plurality of observing windows are arranged surrounding the position of a perforated chamber on the reaction wall device. The test bench device can be used for implementing the experimental research on the geomechanical plane strain models in the stability research of underground engineered tunnels under high geostress condition. The test bench device has the following advantages: 1. a steel frame of the model adopts a high-intensity alloy steel material, thus having good intensity, rigidity and toughness, strong corrosion resistant capacity, and repeated and recycled use in a long time; 2. an external loading method is adopted, thus conveniently realizing jobs such as the installation and the replacing of loading equipment such as hydrostatic triggers, etc.; 3. a toughened glass is arranged surrounding a hole of the reaction wall, thus being convenient for observing the deformation and the crack propagation situation in the surrounding of the hole; 4. an assorted control system of hydraulic loading is combined, thus conveniently realizing graded loading and simulating real geostress distribution situation as accurately as possible.

A kind of anticorrosion asphalt-based epoxy resin water paint is proportionally prepared from modified asphalt emulsion, epoxy resin emulsion, solidifying agent emulsion, filler, assistant and water. Its advantages are high hardness, resistance to corrosion and abrasion, adhesion and softening point, and low pollution.

The invention discloses lignin raw lacquer composite coating. The lignin raw lacquer composite coating prepared mainly comprises raw lacquer, lignin, functional auxiliary agent and diluting agent. The lignin raw lacquer composite coating introduces the lignin extracted from sulphite liquor into the raw lacquer, and effectively utilizes the lignin in the sulphite liquor and reduces the cost when the performance of the raw lacquer is maintained simultaneously. The product is acid resistant, alkali resistant, water resistant, oil resistant and abrasion resistant, has high glossiness and strong adhesion, and is suitable for anti-corrosive application in deep color hardwood furniture and the industry.

The invention relates to the field of an aluminium alloy decoration and protection coating for ships, and in particular relates to a novel aluminum alloy chromium-phosphorus-free nanoscale chemical conversion liquid for ships and an application of the chemical conversion liquid in a chemical conversion film. The chromium-phosphorus-free nanoscale chemical conversion liquid is prepared from a titanium salt, a zirconium salt, a silicon compound, an accelerator, a pH modifier, a surfactant and the like. The film-forming process of the chromium-phosphorus-free nanoscale chemical conversion film successively comprises the following steps of degreasing, washing, acidic etching, washing, chemical conversion, washing and drying. The chromium-phosphorus-free chemical conversion film is prepared from nanoscale titanium oxide, zirconium oxide, alumina and other composite oxides, has excellent corrosion resistance and organic coating adhesion, and can be used as an aluminum alloy surface decoration and protection coating for ships. The chemical conversion film prepared from the chemical conversion liquid in the invention does not contain chromium and phosphorus elements, has excellent corrosion resistance and organic coating adhesion, is simple in construction and convenient in maintenance, and is applicable to construction of large-area aluminum alloy sections.

The invention discloses a diamond composite plating layer, which is plated on surfaces of a steel-iron alloy. The diamond composite plating layer comprises an inner layer and an outer layer, wherein the inner layer is a transition layer which is formed by plating chemical nickel containing phosphorus in a chemical nickel plating mode, and the outer layer is formed by carrying out co-deposition on diamond particles and a nickel-phosphorus alloy to the plating layer in a chemical nickel plating mode so as to form a nickel-phosphorus-diamond particle composite plating layer. By using the technical scheme, the transition layer can improve the bonding force of the plating layer, prevent the diamond particles from directly contacting the steel-iron alloy, and prevent the diamond particles from being absorbed by the steel-iron alloy in a carbon atom form; the nickel-based diamond particle composite plating layer is a high-temperature (140 DEG C) wear-resistant composite plating layer, does not need heat treatment, has apparent hardness higher than 700 HV, and has no influence on the physical properties of a base material; and the nickel base of the composite plating layer is a nickel-phosphorus alloy, therefore the plating layer has excellent corrosion resistance.

Disclosed is a surface treating agent for a galvanized steel sheet that can provide a surface treated galvanized steel sheet, which has various excellent properties such as excellent corrosion resistance and corrosion resistance after alkali degreasing, particularly has a good balance among corrosion resistance, appearance, and grounding properties in a formed film, and also has well balanced excellent properties regarding anti-dew condensation properties and coatability (coating film adhesion). The surface treating agent for a galvanized steel sheet comprises zirconium ammonium carbonate (A), a compound (B), which contains in one molecule two or more functional groups (a) represented by -SiR1R2R3, in which the molecular weight per functional group (a) (average molecular weight/number of functional groups) is in the range of 100 to 5000, an organic phosphonic acid (C), a metal compound (D) containing at least one metal element selected from the group consisting of Zr, Ti, Co, Fe, V, Ce, Mo, Mn, Mg, Al, Ni, Ca, W, Nb, Cr, and Zn, and water. The surface treating agent has a pH value of 6 to 11.

The invention provides a plate type air preheater with glasses as heat exchange plates, belonging to the technical field of heat exchangers. The plate type air preheater comprises an air preheater frame, the air preheater frame comprises an upper cover plate (10), a lower bottom plate (11) and a stand column (5) and is internally provided with a plurality of heat exchange plates (1) which are correspondingly placed in vertical direction; a sealing strip (4) is arranged between every two heat exchange plates (1) which are adjacent in vertical direction; the sealing strips (4) are mutually staggered at 90 degrees and form a plurality of sealing fluid channels which are adjacent and mutually staggered at 90 degrees by being placed in a staggered way so as to respectively form hot fluid channels and cold fluid channels; rectangular glass plates are adopted as the heat exchange plates (1), and the glass can be silicon-boron glass and boron-free low-alkali glass or quartz glass; and supporting strips (2) which are rectangular or S-shaped nonmetal plate bars are arranged among the fluid channels formed by the upper and lower heat exchange plates (1). The invention has dew point corrosion resistance, efficiently recovers the low-temperature exhaust heat of smoke and can reduce the temperature of discharged smoke and enhance the efficiency of a heating furnace.

The invention relates to a production process of a prestress FRP-rib (fiber reinforce plastic-rib) concrete pipe pile. The production process is characterized by comprising the following steps of 1) concrete production, 2) FRP-rib frame skeleton production, 3) end board production, 4)pulling board production, 5) sleeve anchoring, 6) installation of the FRP-rib frame skeleton, 7) concrete material distribution, 8) moulding, 9) prestress tension, 10) centrifugal processing, 11) maintenance and 12) demoulding. By creatively choosing the FRP-rib as a substitute of the pipe pile steel bar and utilizing a tension method applicable to the FRP-rib, structural durability is improved. Compared with common prestress pipe piles, the prestress FRP-rib pipe pile has higher corrosion resistance; while compared with a FRP rib pile, the prestress FRP-rib concrete pipe pile has the advantages of high strength and high bearing capacity. Besides, with novel production process of reasonably utilizing a FRP-rib tension process on a pipe pile, and good effects are achieved.

The invention relates to a feeding device, in particular to an intelligent feeding device for animal husbandry. The technical problem to be solved by the present invention is to provide an intelligent feeding device for animal husbandry with novel structure and good feeding effect. In order to solve the above technical problems, the present invention provides such an intelligent feeding device for animal husbandry, which includes a pole, a fixed pulley, an electric winding wheel, a water inlet, a pull wire, a block, a water tank, a spring, a first pressure switch, Water pipe, second pressure switch, guide plate, etc.; there are poles, water feeding tanks, feeding tanks and brackets on the ground from left to right. There is a water inlet on the right side of the top. The invention achieves the effects of novel structure and good feeding effect, realizes the function of automatically supplying water and feed, not only saves working time of workers, but also improves production and work efficiency of animal husbandry enterprises.

The invention relates to the field of magnesium alloy, in particular to a preparation method of a comprehensive protective wave-absorbing coating on the surface of magnesium alloy and various coatings prepared by the method. The wave-absorbing coating is coated on a micro-arc oxidized ceramic layer on the surface of the magnesium alloy, so that the comprehensive coating which is good in corrosion resistance and in wave-absorbing functionality can be prepared. The invention adopts a magnesium alloy micro-arc oxidation technology and a wave-absorbing coating composite technology, the stable micro-arc oxidation technology is carried out in case of large area by the magnesium alloy micro-arc oxidation technology, and a ceramic layer with a compact microstructure is prepared, so that the corrosion resistance of the magnesium alloy can be obviously improved. The wave-absorbing coating composite technology can be used for sealing the ceramic layer, so that the corrosion resistance of the ceramic layer can be further improved, and the ceramic layer has the function of wave absorption as well. The comprehensive coating provided by the invention has the characteristics of being good in corrosion resistance, wide in electromagnetic wave absorbing frequency range, high in absorption rate, firm in surface bonding and the like, is widely applicable to the fields such as aviation, aerospace, war industry and electronic products, and is high in social value and economic value.

The invention discloses a method for the anticorrosion treatment on the surface of a magnesium alloy material, which comprises the following steps of: completely removing an oxide film layer on the surface of the magnesium alloy material through acid washing; and forming an anticorrosion treatment layer on the surface of the magnesium alloy material through the process steps of chemical nickel-plating, electric plating of amorphous nickel-tungsten-phosphorus, spray coating of an epoxy primer, spray coating of a finishing paint and the like. Particularly, the sprayed epoxy primer is an epoxy coating containing superfine flake metal powder, and the epoxy coating eliminates a small amount of pinholes on the surface of the magnesium alloy material after the treatment, can effectively prevent a corrosive medium from penetrating into a matrix of the magnesium alloy material, can effectively ensure that the magnesium alloy material has good corrosion resistance because the epoxy primer has metal powder of which the electric potential is lower than that of the nickel-tungsten-phosphorus and nickel and can be corroded in preference to a nickel-tungsten-phosphorus plated layer and a nickel plated layer; and simultaneously, the treatment process steps are simplified, and the pollution to the environment and injuries to operators are reduced. The method has the advantages of simple process, convenient operation and low cost.

The invention discloses a preparation method of a high-strength heat-resistant aluminum alloy profile. The aluminum alloy profile comprises the following elements in percentage by mass: 11.8-12.4% of Si, 1.5-2.5% of Cu, 1.1-2.2% of Cr, 0.6-1.3% of Mg, 0.5-1.0% of Mn, 0.4-0.8% of Ni, 0.3-0.6% of Ti, 0.2-0.4% of Be, 0.15-0.35% of Zr, 0.05-0.15% of Cd, 0.1-0.2% of W, 0.05-0.1% of Mo, 0.04-0.08% of La, 0.03-0.05% of Ce, 0.02-0.03% of Yb and the balance of Al. The aluminum alloy profile has the advantages of high heat stability, high high-temperature strength, excellent wear resistance, excellent corrosion resistance, excellent fatigue resistance, low production cost and the like, can be used at 250-300 DEG C for a long time, and is suitable for industrial production.

The invention discloses a multi-functional ground concrete rod. The multi-functional ground concrete rod comprises a concrete rod body and a connection wire special for grounding, which is arranged in the rod body; the rod body is formed by pouring concrete and a reinforcement layer in the rod body; the multi-functional ground concrete rod is characterized in that: at least one built-in bolt hole special for grounding is pre-embedded in the side wall of the rod body; the bolt holes special for grounding are exposed out of the rod body and is flush with the outer wall of the rod body; a rod bottom metal waterproof grounding cover is sleeved on the outer wall of the lower end of the rod body; a built-in bolt hole for a grounding electrode is pre-embedded in the bottom of the rod bottom metal waterproof grounding cover; and the connection wire special for grounding is connected in series with the built-in bolt holes special for grounding in the side of the rod body respectively, and then is connected to the built-in bolt hole of the rod bottom metal waterproof grounding cover. By the multi-functional ground concrete rod, the ground resistance of an overhead line electric pole can be reduced obviously, the corrosion of a grounding device is inhibited, the installing and using requirements of the line outage protective grounding wire can be met, and the theft and damage accidents of an electric grounding device can be avoided.

The invention relates to a rust preventing device and particularly relates to a lubricating and rust preventing device for hardware products. The technical problem to be solved by the invention is to provide the lubricating and rust preventing device for hardware products, which is uniform in lubrication, high in work efficiency and simple in operation. In order to solve the technical problem, the invention provides the lubricating and rust preventing device for hardware products. The lubricating and rust preventing device comprises a rectangular-ambulatory-plane sliding rail, a second sliding block, a moving rod, a top plate, a first sliding rail, an electric push rod, a sponge brush, a first hose, a first one-way valve, a placing frame, a screen plate, a support frame, a bottom plate, a first connecting rod, a second connecting rod, a lifting rod, a piston, a motor, a turntable, a fixed seat, a left frame, a second hose, a water tank, a collecting frame, a supporting seat, a cylinder body, a first sliding block and a second one-way valve. The lubricating and rust preventing device has the effects of lubrication uniformity, high work efficiency and simplicity in operation. By using the lubricating and rust preventing device, the hardware products can be uniformly lubricated, the work efficiency can be increased, lubricating oil can be saved, and the working cost can be reduced.

The invention discloses a zinc-aluminum-magnesium-plated steel plate, a manufacturing method thereof, a thermoforming method and a component. The zinc-aluminum-magnesium-plated steel plate has strongcorrosion resistance of coating. After hot stamping, a coating is completely transformed into an iron alloy layer, no evaporation of coating evaporation phenomenon and no liquid-phase erosion phenomenon is generated, no hard Fe-Al intermetallic compound is generated, the steel plate has high strength and good toughness, the strength of the steel plate is more than 1500 MPa, and the elongation is more than 5%.

The invention discloses a metal zinc coating blackening agent and a preparation method thereof. The metal zinc coating blackening agent consists of the following raw materials in parts by weight: 20 to 25 parts of ammonium molybdate, 0.5 to 0.7 part of copper sulfate, 2 to 3 parts of nickel sulfate, 1 to 3 parts of sodium sulfite, 2.5 to 3.5 parts of sodium thiosulfate, 3.5 to 4.5 parts of aluminum chloride, 3 to 4 parts of zinc chloride, 7 to 8 parts of potassium chloride, 0.3 to 0.5 part of complexing agent, proper amount of pH value regulator, and 40 to 60 parts of water, wherein the pH value of the metal zinc coating blackening agent is between 1.0 and 1.5. The blackening agent can form a blackening film layer with high compactness, high adhesive force and strong corrosion resistance on the surface of the zinc coating; and the blackening process is simple, and the blackening agent is non toxic and environment-friendly.

The invention discloses a method for manufacturing an aluminum magnesium alloy bridge frame, which comprises the treatment of aluminum magnesium alloy sections and the manufacturing of the aluminum magnesium alloy bridge frame. The treatment of aluminum magnesium alloy sections comprises the steps of aluminum bar selection, heat treatment, section extrusion, leveling, and aging. The manufacturing of the aluminum magnesium alloy bridge frame comprises the steps of aluminum magnesium alloy section blanking, hole including connecting film perforation punching on trapezoidal edges, section surface anodic oxidation or electrostatic spraying, and bridge frame assembly. The method has the advantages that: the bridge frame is formed once by extruding aluminum alloy sections, and is light, high in corrosion resistance, convenient in installation, elegance, long in service life which is ten times of that of a steel bridge frame, energy-saving, environmentally friendly and maintenance-free; the loading capacity of the bridge frame is double compared with the steel bridge frame, and the sections have certain long-lasting elasticity and are free from deformation; a large-span aluminum alloy bridge frame adopts sandwich aluminum sections of which the cross sections are 'II'-shaped symmetric double-layer extruded sections and which have strong loading capacity, supporting force and tensile strength to ensure the firmness and safety of the bridge frame.

The invention discloses an intermediate-and-low-radioactivity nuclear waste treatment device. A storage barrel comprises a barrel body, a barrel cover, a passive exhaust valve and a dehydration filtering assembly. The barrel body and the barrel cover are respectively and integrally formed through crosslinked polyethylene, the barrel body is provided with an opening, the barrel cover are in sealed connection with the opening of the barrel body in an openable mode and is provided with a plurality of exhaust holes, the dehydration filtering assembly is arranged at the bottom of the barrel body and can be connected with an external pneumatic diaphragm pump, the passive exhaust valve is arranged on the barrel cover, and gas in the barrel body can be exhausted through the passive exhaust valve and the exhaust holes. Therefore, certain pressure of nuclear waste is kept during treatment, and expansion and breaking, caused by content decomposition, of the storage barrel do not exist. Besides, the barrel body and the barrel cover which are integrally formed and made of the crosslinked polyethylene are stable in chemical property and strong in corrosion resistance so that the nuclear waste can be directly contained in the storage barrel for a long time safely, the phenomena of swelling and crazing do not exist, radioactive liquid can not leak outward or cause environment pollution, the volume rate of the nuclear waste is greatly improved, and the treatment device is simple in structure.

The invention relates to a preparation method of a titanium alloy spring made of a wire with a specially-shaped section and belongs to the technical field of springs. The spring is formed by winding of the titanium alloy wire with the specially-shaped section; the titanium alloy wire comprises the components in percentage by mass as follows: 2-4 of Al, 6-10 of V, 4-8 of Cr, 2-6 of Mo, 2-6 of Zr, 0.1-0.3 of Fe, 0.03-0.15 of Si and the balance of Ti. The section of the titanium alloy spring wire can be rectangular, square, orthohexagonal or oval. The titanium alloy wire wound into the spring is prepared with forging, pressing and hot rolling technologies, the wire is subjected to solution treatment before being wound into the spring, and a finished product of the spring is subjected to aging and strengthening treatment. A titanium alloy which is used for preparing the spring can play a weight reduction role, and meanwhile, the titanium alloy has the good corrosion resistance and the long fatigue life in an ocean environment. With the adoption of the wire with the specially-shaped section, the section area can be increased under the condition that specifications of wires are similar, so that the rigidity of the spring is improved, and the usage requirement of the titanium alloy spring under the high workload can be met.

The invention discloses high chlorinated polyethylene fluorescent paint containing fluorine, which comprises a component A and a component B. The component A is divided into A1 and A2, wherein A1 is high chlorinated polyethylene fluorescent paint primer containing fluorine, and A2 is high chlorinated polyethylene fluorescent paint finish containing fluorine; and the component B is a polyurethane curing agent. Before the high chlorinated polyethylene fluorescent paint containing fluorine is used, the primer is prepared according to the weight ratio of A1 to B is 12:1, and the finish is preparedaccording to the weight ratio of A2 to B is 12:1. The long-term usage temperature of the paint of the invention is smaller than or equal to 120 DEG C and is about 40 DEG C higher than the usage temperature of the paint using original single unmodified high chlorinated polyethylene resin as main film forming matter. In a strong corrosive gaseous environment, the thickness of a paint film is only 180mum, and the service life of the paint film can reach 5-10 years. The high chlorinated polyethylene fluorescent paint containing fluorine can be widely used for prevention of corrosion in the strongcorrosive or intermediate corrosive engineering fields, such as industrial construction, petroleum, chemical industry, medicine, technical pipelines, equipment, steel members, bridges, ship buildingand the like, and has the characteristics of good corrosion resistance, good weather resistance, good construction performance, low construction cost and long service life.

The invention discloses two-component epoxy organic anticorrosive paint. The paint comprises a component A and a component B; the component A is prepared from, by weight, 33-43 parts of epoxy organic silicon resin, 27-35 parts of epoxy resin, 4-7 parts of glass flake, 13-17 parts of pigment, 4-7 parts of filler, 1.3-2.2 parts of auxiliary and 2-4 parts of diluents; the component B is prepared from, by weight, 35-50 parts of polyamide curing agent, 13-17 parts of pigment, 4-7 parts of filler, 0.7-1.2 parts of anti-settling agent and 40-60 parts of solvent. The two-component epoxy organic anticorrosive paint the advantages that it is indicated through the comprehensive detection results of the paint that all physicochemical indexes reach the industrial standard, and a coating is tough, large in adhesive force, high in mechanical strength and long in anticorrosion life. The paint has good corrosion resistance, and it is proved through detection that salt mist resisting time reaches 4000 h, the paint does not bubble or rust. As the coating contains the glass flake with high pigment volume concentration, the glass flake is arrayed in the coating in an alternately overlapping mode to form a labyrinth effect, and the coating is excellent in shielding performance and impermeability and is resistant to permeation and corrosion of a corrosive medium.

The invention provides a high-strength nylon formula for a blower impeller and a preparation method thereof. Base stocks of the formula comprise caprolactam and laurolactam. Besides, glass beads undergoing activation treatment are added in the base stocks to improve the wearability. Meanwhile, a certain amount of plasticizer, dispersant, lubricant, buffering agent, antioxidant, catalyst and cocatalyst are added. During the pouring and molding, balanced pressurization is carried out so as to improve physical and chemical properties. The invention realizes once pouring and molding, easy batch production, low cost, light weight and energy consumption reduction. The impeller is an integrated body, does not need the welding of components, has strong wearability and good safety. The nylon can be substituted for steel, aluminum and other metal materials in the preparation of the blower impeller.

The invention relates to a production method of thin steel strip hot galvanizing. The production method comprises the following steps of uncoiling, welding, chemical desorption, electrolysis, cleaning, air drying, annealing, galvanizing, air cooling, straightening, chemical coating and coiling. A steel strip subjected to galvanizing has good corrosion resistance and better machining performance, the plating layer is firm and uniform, the color is bright, the service life is long, the environment pollution is avoided, and the continuous large-scale production can be realized.

The invention belongs to the technical field of aluminum alloy materials, and relates to an aluminum foil for an aluminum plastic film of a lithium battery and a manufacturing process of the aluminumfoil. The aluminum foil comprises the following components in percentage by mass: 0.08% of Si, 1.35-1.45% of Fe, 0.03% of Cu, 0.03% of Mn, 0.01% of Mg; 0.03% of Zn, 0.03% of Cr, 0.01-0.03% of Ti, andthe balance Al and other unavoidable impurity elements. The manufacturing process comprises the steps of rough rolling, middle rolling, coiling, finish rolling, slitting and annealing. According to the aluminum foil and the manufacturing method, the improved 8021 alloy is adopted, the alloy element proportion is reasonable, the 8021 alloy is adopted to be adjusted in the alloy components within the national standard range, and four passes of high-speed rolling with large reduction amount is adopted during aluminum foil rolling; and medium-high temperature annealing is adopted, so that the deepdrawing performance and the water brushing A-level effect of the product are guaranteed. The manufactured aluminum foil is high in elongation rate, good in corrosion resistance, low in oxygen permeability and moisture permeability and high in composite strength, and capable of meeting the use requirements of the aluminum plastic film of the lithium battery on the aluminum foil.

The invention relates to a high temperature resistant metal passivator, wherein the main raw materials thereof comprise the following components in percentage by mass: 93-95 percent of water, 1-2 percent of phosphate, 0.5-1 percent of accelerant, 0.05-0.1 percent of surfactant and 3-4 percent of high temperature resistant passivation component. The phosphate is one of disodium hydrogen phosphate, monobasic sodium phosphate and sodium phosphate; the accelerant is one of cerium carbonate dehydrate, cerium nitrate and cerous nitrate; the surfactant is one or the mixed compound of OP-10, TX-100 and NP-5, and the mass ratio of the mixed compound is 2:1:1; the high temperature resistant passivation component is one of zirconyl chloride and zirconyl nitrate; and the passivator is regulated through a phosphoric acid, and the pH value thereof is 3.0-5.0. A layer of uniform and compact passivation film is rapidly formed on the surface of a steel material processed through the high temperature resistant metal passivator, the film has strong corrosion-resistant performance, and a passivated steel part has good corrosion-resistant performance whether blow-dried or dried at the temperature of 200-250 DEG C.

The invention discloses a magnesium alloy surface treating method. The method comprises the following steps of: 1) performing micro-arc oxidation treatment on a magnesium alloy, and forming a micro-arc oxidation film layer on the surface of the magnesium alloy, wherein the micro-arc oxidation film layer comprises a compact layer and a loose layer; 2) performing sand blasting treatment on the magnesium alloy subjected to micro-arc oxidation to remove the loose layer; and 3) performing coating treatment on the magnesium alloy, and forming a coating on the compact layer. The invention also relates to the magnesium alloy prepared by the magnesium alloy surface treating method. The magnesium alloy comprises a magnesium alloy matrix and a film layer formed on the surface of the magnesium alloy matrix, wherein the film layer comprises a micro-arc oxidation layer and a coating which is coated on the micro-arc oxidation layer; and the micro-arc oxidation layer consists of the compact layer. By the magnesium alloy surface treating method, the corrosion resistance of the magnesium alloy can be obviously enhanced.

Disclosed is a steel material having excellent corrosion resistance, which is characterized by the following properties (A) to (C); (A) the steel material comprises the following components (by mass) as essential components: C: 0.02-0.15%, Si: 0.10-1.0%, Mn: 0.1-1.5%, S: 0.02-0.5%, Ti: 0.02-0.15%, Ca: 0.0001-0.01% and Al: 0.01-0.50%, and contains at least one component selected from Cu in an amount of 0.05-3.0% and Ni in an amount of 0.05-6.0%, with the remainder being Fe and unavoidable impurities, wherein the contents of Ni, Cu, S and Ti have the relationship represented by the following formula: [(Ni+4.5xCu)xSx2500xTi>5]; (B) the surface of the steel material is covered with a rust containing S in an amount of 0.3-5.0% by mass and further containing at least one element selected from Ti, Cu, Ni, Nb, Zr and V in the total amount of 0.5-10.0% by mass; and (C) a rust layer is formed on the surface of the steel material, wherein the crystallite size of a ss-FeOOH component in the rust layer is less than 50 nm as measured by the X-ray diffraction method, and the rust layer has a specific surface area of 10 m/g or greater as measured by the molecular adsorption method.

The invention discloses a cold corrosion agent for displaying a dendritic structure of a 800 H nickel base corrosion resistant alloy and a corrosion method, and belongs to the field of analysis of metallographic structures. The cold corrosion agent of the dendritic structure comprises the following chemical components in proportion: 4.0-6.0 g of copper chloride, 20-25 ml of hydrochloric acid, 20-25 ml of nitric acid, and 20-30 ml of distilled water. A cotton ball is used for dipping the cold corrosion agent to lightly wipe a sample inspection surface; the observation is performed while wiping; when the clear dendritic structure is generated on the inspection surface, water is immediately used for flushing away the cold corrosion agent; then, alcohol is used for flushing the sample inspection surface; finally, an air blower is used for drying; and a microscope is used for observing the dendritic structure on the sample inspection surface. The inspection method is simple in formula of the cold corrosion agent, is simple in operation procedures, and can quickly and clearly observe the solidification dendritic structure of the 800 H nickel base corrosion resistant alloy.