44results about How to "Improve salt spray corrosion resistance" patented technology

The invention relates to an aluminum alloy surface corrosion resistance treatment and in particular discloses a preparation method for an aluminum alloy surface chromium-free corrosion-resistant chemical conversion membrane formation solution and a membrane layer. The membrane formation solution is a mixed solution with a main salt, a buffer agent, a membrane formation promoter, a pH value adjuster and water, and the pH value of the membrane formation solution is 2-5. The chemical conversion membrane formation preparation method comprises four steps of oil removal, alkali washing, acid washingactivation and membrane formation, the whole treatment process is free of components such as chromium or chromate which can do harm to the environment, the membrane formation process is simple, the membrane formation solution is low in constitution component cost, the obtained chemical conversion membrane is uniform and dense and excellent in corrosion resistance, and the bonding force of an organic coating and an aluminum alloy substrate can be remarkably improved.

The invention provides a laser marking method for increasing salt spray corrosion resistance of two-dimension codes on a surface of an aluminum alloy. A DM code bottom layer is formed by directly marking with laser on an aluminum plate substrate; a square pattern is made on wax paper by using a thermo-sensitive method; the square pattern is larger than specification of existing DM codes on the surface of an aluminum plate; electrochemical etching is carried out in a DM code area of the aluminum plate by using an electrochemical etching method with the wax paper as a template to form a layer of oxidation film having protection function, so that a DM code mark with salt spray corrosion resistance is formed. Compared with the DM code mark directly marked on the surface of the aluminum alloy with laser, salt spray corrosion resistance of the DM code mark generated by the method can be increased greatly, and the oxidation film in a marking area is controllable; the influence of the mark for part matrix out of the marking area is poor; the operation is simple; and the efficiency is higher.

The invention discloses a waterborne epoxy graphene zinc anticorrosive coating. The waterborne epoxy graphene zinc anticorrosive coating comprises a first component and a second component, wherein thefirst component is prepared from the following components in parts by weight: 5-10 parts of a waterborne epoxy resin curing agent, 0.5-1 part of a dispersant, 1-3 parts of an anti-settling agent, 1-3parts of a coalescing agent, 10-15 parts of body pigment, 42-65 parts of zinc powder and 4.5-5 parts of graphene dispersion slurry. The second component is prepared from the following components in parts by weight: 30-40 parts of aqueous epoxy emulsion, 1-2 parts of an anti-flash rust agent, 5-15 parts of water and 0.2-0.8 part of a defoaming agent. The waterborne epoxy graphene zinc anticorrosive coating has high utilization rate of zinc powder and is easy to prepare, and the formed coating has excellent comprehensive properties, such as good compactness, excellent cathodic protection performance and shielding performance, anticorrosive performance is remarkably improved, and the waterborne epoxy graphene zinc anticorrosive coating has wide application prospects in the field of marine equipment anticorrosion.

The invention discloses a salt mist-resisting alloy wire and a manufacturing process thereof. The salt mist-resisting alloy wire comprises a steel wire conductor, the outer side of the steel wire conductor is wrapped by a copper plated layer, the outer side of the copper plated layer is wrapped by a nickel plated layer, the outer side of the nickel plated layer is wrapped by a tin plated layer, the thickness size of the tin plated layer is larger than that of the nickel-plated layer, and the outer side of the tin plated layer is wrapped by a polishing film. The manufacturing process specifically comprises the first step of material selecting, the second step of quenching and tempering, the third step of electroplating of the copper plated layer, the fourth step of electroplating of nickelplated layer, the fifth step of electroplating of tin plated layer, and the sixth step of polishing and passivation. By optimizing the production process, clad layers are more uniform and smooth; polishing passivation is adopted, and a polishing film is formed; and under the situation of improving the salt mist corrosion resisting performance, the thickness of the tin plating layer can be appropriately reduced, and therefore the production cost is reduced.

The invention discloses environment-friendly emulsified anti-rust oil. The environment-friendly emulsified anti-rust oil is prepared from the following components in percentage by mass: 5-20% of barium-free sulfonate, 0.5-5% of N-octadecylamine oleoylsarcosinate, 2-10% of magnesium lanolin soap, 2-10% of triethanolamine oleate soap, 0.5-5% of fatty alcohol polyoxyethylene ether, 0.5-5% of triethanolamine, and the balance of base oil. According to the provided environment-friendly emulsified anti-rust oil, oil soluble anti-rust agents without heavy metals such as barium and lead are adopted, and are environment-friendly; the oil soluble anti-rust agents such as the barium-free sulfonate, the N-octadecylamine oleoylsarcosinate and the magnesium lanolin soap are compounded with the triethanolamine oleate soap, the fatty alcohol polyoxyethylene ether, the triethanolamine and the base oil, the anti-rust performance, especially the salt-spray corrosion resistance of the emuldified anti-rustoil can be effectively improved.

The invention relates to a control method of surface cracks of a passivated membrane of a chromium-free passivated galvanized plate. The method includes the steps that a steel plate on a hot galvanizing production line is subjected to galvanizing treatment, and the galvanized plate is generated; after being washed clean, the galvanized plate is dried through an air knife; the dried galvanized plate is subjected to finishing; the finished galvanized plate is passivated, and the passivated galvanized plate is generated; the surface of the passivated galvanized plate is cleaned; the passivated galvanized plate is dried. The control method effectively avoids the surface cracks of the chromium-free passivated galvanized plate, and the salt-spray corrosion resistance of the chromium-free passivated galvanized plate is improved.

The invention provides a novel high-corrosion-resistance waterborne epoxy curing agent and a preparation method thereof. The molecular structure of the epoxy curing agent is as shown in the formula I or II: the formulas I and II are as shown in the specification. The novel high-corrosion-resistance waterborne epoxy curing agent has the following beneficial effects that an EO chain segment and a little of neutralized ion amine and hydroxyl in the curing agent structure provide corresponding hydrophilcity for emulsification of the curing agent, and rigid structures on aromatic diamine and epoxy resin provide high lipophilicity and corrosion resistance for the curing agent; 2, a quinoline structure in the curing agent structure achieves an amphiphilic balance effect under a phase action system, so that the salt fog corrosion resisting property of a paint film matched with epoxy resin is greatly improved; by the introduction of the aromatic diamine, an effective primary amine group can be provided for the curing agent through a steric effect, and an aromatic group is introduced, so that the corrosion resisting effect of the paint film is effectively enhanced; by introducing an epoxy resin structure into the curing agent structure, the curing agent has the water-oil content close to that of the epoxy resin, and the shortcomings of the paint film can be effectively reduced.

The invention discloses a device for a salt mist tolerance test of an aluminum alloy workpiece. The device comprises a steam box, a fan, a burner, a heat exchanger, a vertical lifting door and a heatable water tank, wherein the steam box comprises a workpiece steaming chamber, an air return chamber and an air supply chamber; a test method of salt mist tolerance of an aluminum alloy workpiece usingthe device comprises the following steps: (1) preheating of the steam chamber; (2) entering of the workpiece into the steam chamber; (3) primary flushing; (4) heating treatment; (5) moisturizing treatment; (6) secondary flushing; (7) discharging of the workpiece out of the steam chamber. According to the test method of salt mist tolerance of the aluminum alloy workpiece, an aluminum alloy workpiece test enhanced than before can be effectively realized, so that the workpiece can endure long-time salt mist resisting test without being damaged, and the quality of the final product is remarkablyimproved; the device for the salt mist tolerance test of the aluminum alloy workpiece is perfect in structure and convenient to use and is completely suitable for the test method; a safe and effectivetreatment environment is provided, the product quality is effectively improved, and the method and device are worthy of popularization and application.

The invention relates to the technical field of functional composite rubbers in electronic materials, particularly to an environment-resistant electromagnetic protection composite conductive rubber and a preparation method thereof. The composite conductive rubber is formed by integrally vulcanizing a conductive part and a non-conductive part. According to the invention, the basic performance of the prepared composite rubber completely meets related standards of a conductive rubber gasket; a fluorosilicone conductive rubber is used as base rubber, so that the prepared composite rubber is stablein performance in an oil seal environment so as to resist oil corrosion; through a carbon nano-tube reinforcing agent, the mildew-proof characteristic and the flexibility of a composite strip are enhanced; through graphene oxide, the salt spray corrosion resistance of an aluminum-silver composite conductive rubber is enhanced; through glass micro-beads, the thermal stability of the composite strip in a high-temperature forming process is enhanced; the main function of the non-conductive part of the prepared composite conductive rubber strip is environment sealing, and the main function of theconductive part is electromagnetic sealing; and the environment-resistant special requirements of equipment operating in an extreme environment on the electromagnetic protection sealing strip are met.

The invention relates to an industrial production method of galvanized IF steel with high salt spray corrosion resistance, which comprises the steps of steelmaking, RH refining, continuous casting, hot rolling and galvanizing, in the galvanizing step, the speed of strip steel is controlled to be 120-130 m/min, the roughness of a working roll of a finishing machine is 2.5-3.5 [mu] m, the surface roughness Ra of a galvanized plate is controlled to be 1.2-1.6 [mu] m, the air knife spacing is 6-9 mm, and air knife pressure is 200-350 mbar; and a target zinc layer is accurately controlled at the upper limit of the zinc layer weight target value, and the salt spray corrosion resistance is improved. The IF steel plate galvanized sheet produced by the method can meet the requirement that the white rust area of the surface is less than 1% in a 120-hour salt spray test, and the salt spray corrosion resistance of the galvanized IF steel is greatly improved.

The invention discloses a compact wide-field white light sighting telescope optical system, which adopts a Kepler telescope system and comprises an objective lens group, an image rotation group, a reticle and an eyepiece group, the objective lens group adopts two groups of three-piece spherical lenses, the image rotation group adopts three groups of five-piece spherical lenses, and the image rotation group is arranged behind an image plane of the objective lens group; the reticle is arranged behind the image rotation group, and the eyepiece group adopts three groups of five spherical lenses and comprises a first eyepiece lens group, a second eyepiece lens group and a third eyepiece lens group. The white light sighting telescope optical system is good in imaging quality, free of sensitive size, good in lens processing technology, reasonable in optical element arrangement, compact in structure, small in size and high in engineering realizability, and has practical application value.

The invention relates to a stainless steel desulphurization agent. The stainless steel desulphurization agent comprises, by weight percentage, 10.4%-12.7% of wetting agents or polyhydric alcohol, 2.5%-5.0% of emulsifying agents, 7.7%-9.5% of complexing agents A, 0.5%-1.0% of penetrating agent or corrosion inhibitor, 5.8%-8.0% of complexing agents B, 5.5%-7.5% of complexing agents C and 56.3%-67.6%of deionized water. The stainless steel desulphurization agent is an agent which can effectively reduce the content of elemental sulfur and the content of sulfides on the surface of stainless steel,the content of elemental sulfur and the content of sulfides on the surface of the stainless steel per square meter can be reduced to 0.02g to 0.03g, the neutral salt fog testing time of the 304 stainless steel which is subjected to desulphurization treatment through the stainless steel desulphurization agent can be 96 hours or above, namely, the salt fog resistance testing capacity and the corrosion resistance capacity of the 304 stainless steel are remarkably improved, the desulphurization effect of the stainless steel desulphurization agent is better, and the stainless steel desulphurizationagent can achieve the purposes that the mechanical property of the surface of the stainless steel can be effectively improved, and the welding problem of the surface of the stainless steel can be effectively solved.

The invention relates to the technical field of power protection materials, and particularly relates to a protective coating for high-voltage and high-frequency power equipment. The protective coatingcomprises the following components: a pure acrylic emulsion, fluorosilicone resin, polyvinylpyrrolidone, fillers, an anti-radiation additive, sodium nitrite, hydroxypropyl methyl cellulose ether, nonylphenol polyoxyethylene ether, an antiseptic bacteriostat and a defoamer, wherein the structure of the anti-radiation additive comprises a superhard base core composed of inorganic fillers, anti-radiation functional particles distributed on a surface of the base core, and a polyamide-imide film layer coating an outer layer of the anti-radiation functional particles; the fillers contain titanium dioxide, lithium-based bentonite and palygorskite powder; the antiseptic is isothiazolinone or thiophanate methyl; and the defoamer is a silicone defoamer or a mineral oil defoamer. The coating provided by the invention has advantages of high film strength, good adhesion, relatively good corrosion, rust and corrosion resistances, and excellent anti-radiation performance.