39results about How to "Extend corrosion resistance time" patented technology

The invention belongs to the technical field of metal material surface processing and relates to a production method for a ship fastener complex coating. A zinc impregnation coating, a zinc-aluminum coating and an epoxy coating are arranged on the fastener surface from internal to external and zinc impregnation, washing, zinc-aluminum coating liquid dip-coating, zinc-aluminum coating solidification, epoxy coating liquid dip-coating and epoxy coating solidification are performed on the faster after sequentially being performed on oil removing and rust removing to form into a protective layer. The production method for the ship fastener complex coating has the advantages of being simple in production technology and reasonable in principle. The complex coating has the advantages of being good in corrosion resistance, being capable of effectively solving the problem that the faster is corroded in the seawater environment and being environmentally friendly.

The invention relates to the field of metal surface treatment agents, and relates to a phosphorus-free nano vitrification agent, and a preparation method and application thereof. The phosphorus-free nano vitrification agent is prepared from the following raw materials in percentage by mass: 3-6% of fluorozirconic acid, 3-7% of zirconium oxychloride, 0.1-0.6% of ammonium fluozirconate, 0.8-2% of tartaric acid, 0.5-1% of sodium nitrate and the balance of water. The phosphorus-free nano vitrification agent provided by the invention can be operated at normal temperature, and is short in treatment time and simple in process; almost no deposit exists, and nozzle blocking is avoided; the waste treatment cost is reduced; and the adhesive force between paint and metal can be obviously improved, and the corrosion resistance time of the metal can be prolonged.

The invention provides a graphene oxide-carbon quantum dot complex modified anticorrosive coating and a preparation method thereof, and belongs to the technical field of coatings. The coating comprises the following raw materials: a graphene oxide-carbon quantum dot nano complex, water-based alkyd resin, titanium dioxide, barium sulfate, a dispersant, a defoaming agent, a thickening agent, an auxiliary agent and a curing agent; and the preparation method comprises the steps of preparing the graphene oxide-carbon quantum dot nano complex, preparing graphene oxide-carbon quantum dot slurry, preparing a pre-prepared coating, and adding the curing agent and performing mixing to obtain the anticorrosive coating. The anticorrosive coating provided by the invention has good corrosion resistance,high mechanical strength and strong environmental protection; and the preparation method has a simple process and is easy to operate.

The invention discloses corrosion-resistant long-acting antirust liquid. Raw materials of the corrosion-resistant long-acting antirust liquid comprise, by weight, 35-45 parts of compound corrosion inhibitor, 0.1-0.3 parts of a surface active agent, 0.2-0.4 part of hydroxy propyl cellulose, 0.3-0.5 part of polyethylene glycol, 0.1-0.3 part of a defoaming agent, 1-3 parts of sodium gluconate, 0.2-0.3 part of benzisothiazolones and 50-54 parts of water, wherein raw materials of the compound corrosion inhibitor comprise phytic acid, sodium molybdate, diethanol amine, monoethanolamine borate and 2-methyl benzimidazoline. According to the corrosion-resistant long-acting antirust liquid, by means of cooperation of the phytic acid, the sodium molybdate, the diethanol amine, the monoethanolamine borate and the 2-methyl benzimidazoline, the film forming speed of a protective film is increased, the corrosion speed is decreased, the thickness of the protective film is increased, corrosion media are prevented from making contact with metal, and the corrosion-resistant long-acting antirust liquid is made to have good corrosion-resistant performance and long-acting antirust performance.

The invention relates to a surface rust preventing treatment process for iron art products and provides a novel spraying line production technique. The surface rust preventing treatment process is characterized in that traditional phosphating is replaced by ceramic treatment on a spraying flow production line, common urban tap water is replaced by small cluster water with activity in each washing link during spraying, and common water base degreasing fluid is replaced by small cluster water base degreasing fluid. Compared with traditional phosphating, the method uses non-phosphorus ceramic treatment for pretreatment in prior to nano spaying, and accordingly adhesive force between coating and metal can be increased evidently, and corrosion-resistant time of metal can be prolonged.

The invention relates to a biological magnesium alloy with a surface coated with a sodium magnesium fluoride film and a preparation method thereof. The surface of the biological magnesium alloy is coated with the sodium magnesium fluoride film. The preparation method of the biological magnesium alloy comprises the following steps: carrying out alkaline oil removal; washing; preparing the sodium magnesium fluoride film; washing; washing by using alcohol; air-drying. The method for preparing the sodium magnesium fluoride film particularly comprises the following steps: immersing the biological magnesium alloy into a treatment solution with the temperature of 75-90 DEG C and the molar concentration of sodium fluoride and hydrofluoric acid respectively equal to 1.6 mol/L and 4.8 mol/L; performing heat preservation for 10-90 minutes, and then taking out the biological magnesium alloy. According to the biological magnesium alloy with the surface coated with the sodium magnesium fluoride film, the sodium magnesium fluoride film has the characteristics of simple preparation process, convenience for operation, suitability for industrial production, and the like, and can be used for the surface modification coating of a magnesium alloy; the biological magnesium alloy disclosed by the invention can be used for preparing a biological magnesium alloy device.

The invention discloses a preparation method of a high anti-corrosion coating on the surface of a sintered Nd-Fe-B magnet. The method comprises the steps that a machined and shaped Nd-Fe-B magnet is preprocessed, the preprocessed Nd-Fe-B product is soaked with a pre-processing solution, and the pre-processing solution is prepared by mixing distilled water, a coating agent and an accelerator; priming coating of a ZnAl coating solution is performed on the surface of the soaked Nd-Fe-B magnet, and the Nd-Fe-B magnet with the ZnAl coating obtained after priming coating is obtained; top coating ofa Al-enriched coating solution is performed on the surface of the Nd-Fe-B magnet obtained after priming coating, and the high anti-corrosion Nd-Fe-B magnet is obtained. Due to two times of coating processing, the porosity between the magnet and a corrosive medium is effectively lowered, the binding force between the coating and the magnet is improved, and the sintered Nd-Fe-B magnet has the good corrosion resistance. Due to the ZnAl coating obtained after priming coating, the quantity of a medium entering the deeper layer of the coating is greatly reduced, and therefore the high temperature and high pressure resistance and the ageing resistance of the magnet are greatly improved.

The invention provides a resin anticorrosive coating which is prepared from resin, a graphene and ferric oxide composite material, an auxiliary and a solvent. According to the resin anticorrosive coating, the adding mode of a graphene material is changed; firstly, graphene is compounded with ferric acid in the coating, thus obtaining the graphene and ferric oxide composite material, and then the treated graphene and ferric oxide composite material is combined with other components, thus obtaining the resin anticorrosive coating; the problem on dispersion of the graphene can be well solved, and perfect exertion of high performance of the resin anticorrosive coating is guaranteed; furthermore, no other auxiliaries are needed, so that introduction of impurities is reduced, and the shortcoming of non-uniform mixing of the graphene material in a coating system is overcome; the graphene can be uniformly dispersed; and in addition, the graphene and ferric oxide composite material can guarantee less folds of the graphene in a horizontal spreading state, os as to better exert the performance of the graphene.

The invention discloses a roller plating process of trivalent yellow zinc. The roller plating process comprises the following steps of raw material purchasing, feeding, chemical oil removal, water washing, electrolysis oil removal, water washing, acid washing, water washing, electrolysis oil removal, water washing, activation, water washing, alkali soaking, electroplating, water washing, film thickness inspection, transferring, light emitting, water washing, passivation, water washing, spin drying, sealing, drying, discharging, final inspection, packaging and storage, wherein in the passivation step, the raw materials subjected to the light-out water washing are added into a passivating agent aqueous solution for passivating, the pH value is controlled to be 1.6-2.0, the temperature is 24-35 DEG C, the soaking time of the passivating agent is 45-100 s, and the air stirring pressure is 0.4 MPa; and the passivating agent comprises the following components in parts by weight: 5-8 parts ofchromium chloride and 18-22 parts of sodium nitrate, 8-12 parts of sodium fluoride, and 35-45 parts of nickel sulfate. The process has the beneficial effects that hexavalent chromium in the passivating agent can be replaced with trivalent chromium to produce the yellow zinc, so that the characteristics of environmental friendliness and low toxicity are achieved.

The invention discloses a steel surface rust conversion emulsion. The steel surface rust conversion emulsion is prepared from 48-55wt% of deionized water, 8-15wt% of aqueous emulsion, 20-28wt% of industrial phosphoric acid, 0.5-1wt% of triethanolamine borate, 2-5wt% of alumina, 4-7wt% of sulfamic acid, 1-3wt% of oxalic acid, 1.5-2.5wt% of citric acid, 1-2wt% of zinc chloride, 0.5-1.5wt% of manganese chloride, 2.5-5wt% of hexamethylene tetramine and 0.5-1.5wt% of sodium carboxymethyl cellulose. The steel surface rust conversion emulsion has the characteristic that 1, rust removal and prevention functions are obtained and adaptability is good, 2, a bonding force is good, the steel surface rust conversion emulsion can be combined with various types of paint, coatings and paste ash and does not produce dissolution problems such as wrinkling and bubbling and an antirust capability is improved by 30-50%, 3, energy saving, environmental protection, no pollution and no blind angle in construction, and labor and time saving are realized, and 4, the steel surface rust conversion emulsion is suitable for conversion of rust on the surfaces of various labeled steel and cast iron and realizes conversion of harmful rust into a film beneficial for steel surface corrosion resistance.

The invention relates to the technical field of electroplating, in particular to a corrosion resistant coating of a silver combined coating. The corrosion resistant coating comprises a base coating, afirst silver coating, a first gold coating and a rhodium ruthenium coating which are sequentially electroplated on the surface of a base material, the base coating is used for adjusting the surface flatness of the base material, the first silver coating is used for improving the conductivity of the base material, the first gold coating is used for improving the adhesion of the adjacent coating, and the rhodium ruthenium coating is used for improving the corrosion resistance and wear resistance of the base material. The coating structure prepared from the coating has good wear resistance, oxidation resistance, conductivity and corrosion resistance, and the adhesiveness between the electroplating coating and the base material is good.

The invention relates to the technical field of electroplating, in particular to a corrosion-resistant coating for an interface of an electronic device. The corrosion-resistant coating comprises a substrate plating layer plated on a surface of a substrate, the substrate plating layer is a nickel-plated tungsten layer for improving corrosion resistance of the substrate, the surface of the nickel-plated tungsten layer is plated with a pre-plating layer for improving the adhesion of adjacent plating layers, a first silver plating layer for improving corrosion resistance and the electrical conductivity of the substrate, and a second gold plating layer for improving adhesion of adjacent plating layers. a third rhodium layer for improving corrosion resistance and wear resistance of the substrateand a fourth gold plating layer for improving the solderability of the substrate. The coating structure combined by the above plating layers has the better wear resistance, oxidation resistance, electrical conductivity and corrosion, and the adhesion between the plating layer and the substrate material is good, and the welding property of the substrate is also improved.

The invention provides a vitrification agent and a preparation method and a using method thereof. The preparation method of the vitrification agent mainly comprises the following steps: under the condition of continuous stirring, adding low-molecular-weight water-soluble silane, citric acid, a complexing agent, sodium nitrate and zirconium propyl oxide in water of a reaction kettle; and finally, adding water to regulate density. The vitrification agent is prepared from the following raw materials according to the formula: the low-molecular-weight water-soluble silane, the citric acid, the zirconium propyl oxide, the complexing agent, the sodium nitrate and the water. The using method of the vitrification agent comprises the step of only needing to dilute the vitrification agent with water.By the vitrification agent and the preparation method and the using method thereof, the technical problems of environmental pollution, complicated process, high energy consumption and high cost in the prior art are solved.

The invention provides a vitrification agent and a preparation method and an application method thereof. The vitrification agent contains the following raw materials of, by weight, 1%-5% of ammonium fluorozirconate, 0.2-1.5% of acetic acid, 0.5-0.8% of citric acid, 0.5-3% of vinyl silane, 0.1-3% of sodium chloride, 0.2-1% of zinc oxide and the balance water. The preparation method of the vitrification agent mainly comprises the following steps of 1, under normal temperature and normal pressure, water which accounts for two thirds of a formula amount is added into a reaction container, and thewater is slowly and non-stopping stirred; 2, the ammonium fluorozirconate, the acetic acid, the citric acid, the vinyl silane, the sodium chloride and the zinc oxide are sequentially and slowly addedinto the reaction container according to the formula amount while the stirring is kept; and 3, after a liquid stirring tool is continuously stirred for a certain time, the residual water is added andthe density is adjusted until 1.01-1.03 g/ml. The application method of the vitrification agent mainly comprises the following steps of degreasing treatment, two water washing, surface treatment on the vitrification agent prepared by the method, washing with pure water, drying, spraying and solidifying.

The invention belongs to the technical field of coatings, and particularly relates to a high-adhesion zinc powder anticorrosive coating, a preparation method thereof and application of the high-adhesion zinc powder anticorrosive coating in the field of corrosion resistance. The zinc powder anticorrosive paint is prepared by mixing a component A and a component B according to a mass ratio of (24.2-36.3): 1, the component A comprises epoxy resin, a solvent A, mica powder, talcum powder, an anti-settling agent, a corrosion inhibitor and zinc powder, and the component B comprises a curing agent and a solvent B; the corrosion inhibitor is one or a mixture of more of a silane coupling agent, acetylacetone and an organic-inorganic hybrid modified silane coupling agent. The high-adhesive-force zinc powder anticorrosive paint provided by the invention has the characteristics of high adhesive force to a base material, small adhesive force loss in a service process, long corrosion-resistant time and the like.