150results about How to "Reduce galvanic corrosion" patented technology

The present invention provides one kind of water thinned industrial paint based on water dispersed organosilicon epoxy acrylate. The water thinned industrial paint is prepared with water dispersed organosilicon epoxy acrylate, inert antirust pigment, active antirust pigment, nanometer material modified antirust pigment, stuffing, dispersant, wetting agent, thickener, drying agent, mildew inhibitor, preservative, defoaming agent, deionized water and other materials. The water thinned industrial paint with water dispersed organosilicon epoxy acrylate as base material can form coating with the features of high mechanical strength and high anticorrosive performance similar to that of epoxy resin as well as the features of high weather resistance and good decoration performance like acrylate resin. The water thinned industrial paint has convenient use and wide application range.

The invention relates to a silver alloy wire and a preparation method thereof. The silver alloy wire is prepared from the following components of 0.5-10 percent of Au, 0-1 percent of Pt, 1-6 percent of Pd, 0-1 percent of Rh, 0-1 percent of Cu, 0-500ppm of Ln, 0-200ppm of Ce, 0-0.5 percent of Al, 0.7-3 percent of Ti, 0-0.2 percent of Si, 0-0.3 percent of Zn, 0-1 percent of Sn, 0-10 percent of Be and the balance of Ag. A directional continuous casting process is adopted. The prepared silver alloy wire overcomes the problem that the bonded silver wire is easily subjected to sulfur corrosion in the prior art, and has a series of other excellent characteristics.

The invention discloses an Al-Fe-Zn-Mg rare earth alloy wire and a preparation method thereof. The aluminum alloy comprises the following elements: 0.3-1.2wt% of Fe, 0.01-0.3wt% of Zn, 0.01-0.4wt% of Mg, 0.1-1.5wt% of rare earth element and the balance of Al and inevitable impurities, wherein the rare earth element is composed of one or more of cerium, lanthanum, neodymium and yttrium. The preparation method of the aluminum alloy wire comprises the following steps: preparing an aluminum alloy rod through smelting, casting and rolling, performing insulation treatment in a heat holding cover at 240-320 DEG C for 10-20 hours, wiredrawing and extruding insulating material on the wire; or preparing an aluminum alloy rod through smelting, casting and rolling, drawing the aluminum alloy rod to prepare the aluminum alloy wire, performing semi-annealing treatment in an annealing furnace at 340-380 DEG C for 5-10 hours, and finally extruding insulating material on the wire. The aluminum alloy wire prepared by the method of the invention has excellent electrical property, mechanical property and corrosion resistance and can be used in the wire and cable conductors.

The invention provides a kind of water industrial paint which is single group multi-room cross linking. The paint uses water filming polymer as the base material, the active paint filler and the film surface modifying agent is used as the modification material, and adds in other color fillers, dispersant, antifoam agent, thickener, rot-proof and sterilization agent, filming assistant and water. The paint can form the paint film through cross linking in room temperature, it needn't heating and solidification, it has excellent film rigidity and dirt resisting performance; there can acquire three layers of film only by on time painting; the rot-proof performance is great; the construction of the product is convenient, the applied range is spread, it can upgrades the efficiency of working, saves the cost, reduces the consumption, the product has a good prospect.

An insert for construction supports such as joist hangars and hurricane straps provides corrosion protection from chemicals and moisture in exterior construction lumber. The insert is a semi-rigid body having a shape that fits the construction support so that surfaces of the insert are disposed between the support and the construction lumber at joints in the construction. In the preferred embodiments, the inserts are made of a plastic material and provide a chemical, moisture and electrical barrier between the support and exterior lumber elements of a structure.

The invention discloses a hot roll for rolling a titanium plate, and a manufacturing method of the hot roll. The hot roll comprises the following chemical constituents in percentage by weight: 0.30-0.50% of C, 0.60-2.00% of Si, 0.20-1.00% of Mn, 4.50-6.00% of Cr, 0.05-0.65% of Ni, 1.00-2.00% of Mo, 0.50-1.50% of V, less than or equal to 0.025% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot roll for rolling the titanium plate comprises the processing steps of steel ingot refining, roll blank forging, thermal refining, induction quenching treatment, tempering treatment and the like. Compared with the traditional hot roll made of a Cr3 material, the hot roll is good in abrasive resistance, corrosion resistance and thermal crack resistance, and the service life of the hot roll can be prolonged by above 70%.

The invention discloses a preparation method of an aqueous fluorine-modified phosphorus-containing acrylate emulsion. The preparation method comprises the steps of firstly preparing a pre-emulsion, then preparing a seed emulsion, and carrying out emulsion polymerization, so as to obtain the milky-white and slightly-blue aqueous fluorine-modified phosphorus-containing acrylate emulsion. According to the preparation method, a phosphate emulsifier is taken as an anionic emulsifier, meanwhile, phosphate is added as a functional monomer, phosphate groups are intruded into the emulsion, so that the emulsion has the characteristics of fine granularity and flash rusting resistance, and a coating has high adhesive force and certain salt water resistance; by adding a fluorine-containing modified monomer having good effects in the reduction of surface free energy and the improvement of surface dewatering and oleophobic performance, the water resistance of the coating of the emulsion is enhanced, and the pollution resistance of the coating of the emulsion is improved; meanwhile, the utilized fluorine-containing modified monomer is a fluorine-containing acrylic monomer, so that the problems of environment friendliness and biological harm of a long-fluorocarbon-chain compound are avoided, and the prepared emulsion is environmental friendly; the utilized nonionic emulsifier does not contain APEO (alkylphenol ethoxylate) and is environmental friendly.

The invention discloses a suspension device for tunnels. The suspension device mainly comprises an embedded sleeve, a toothed slot, a countersunk head screw and an elastic gasket, wherein the embedded sleeve is cast in a tunnel concrete duct piece in advance, the casting position is in the clearance part of the reinforcement cage structure of the tunnel concrete duct piece, the toothed slot and the embedded sleeve, by use of the countersunk head screw, are cooperatively connected with the inner arc surface of the tunnel concrete duct piece or in a semi-inlaid arrangement on the inner arc surface of the tunnel concrete duct piece, so as to prevent the embedded sleeve and the toothed slot from being in contact with the reinforcement cage structure of the tunnel concrete duct piece. The electrochemical corrosion on the main structure of the tunnel by stray current can be effectively lightened, the destruction on the main structure of the tunnel concrete duct piece by manual drilling and expansion bolts in the prior art can be prevented, the construction efficiency in tunnels can be increased, the proper specification of the toothed slot can be selected according to the concrete engineering requirements, the toothed slot can be conveniently replaced, the maintenance cost and the operation cost can be reduced, and the service life of the tunnel concrete duct piece can be prolonged.

The invention discloses an air spring for a railway passenger vehicle and a production method of the air spring. The air spring comprises an upper cover plate assembly, an air bag, a rubber seat, an auxiliary spring assembly and a throttling flange which is located in the middle of the rubber seat and connected with the rubber seat, wherein the rubber seat is mounted above the auxiliary spring assembly; the air bag is located above the rubber seat, and the upper cover plate assembly is located above the air bag; the upper cover plate assembly comprises an upper cover plate flat plate, an upper cover plate locating pin, upper cover plate vulcanized rubber, upper cover plate sealing rubber and an upper cover plate support plate connected to the lower side of the upper cover plate flat plate. The production method of the air spring for the railway passenger vehicle comprises the following steps: producing the upper cover plate assembly; producing the air bag; producing the rubber seat; producing the auxiliary spring assembly; assembling the components to form the air spring for the railway passenger vehicle. The air spring can provide high bearing capacity under the condition of smaller mounting height and provide proper vertical and horizontal stiffness values. The air spring manufacturing process control capacity is improved, and the manufacturing cost of the air spring is reduced.

The invention discloses a high-current power supply relay which comprises a casing, an electromagnetic driving mechanism and an electric contact assembly, wherein the casing comprises a lower casing; the electromagnetic driving mechanism comprises a coil rack and movable magnetic-conductive metal cores arranged in the coil rack, and a bakelite plate is arranged on the electromagnetic driving mechanism; the electric contact assembly comprises a first static contact piece and a second static contact piece which are arranged on two sides of the bakelite plate as well as a movable contact piece arranged on the movable magnetic-conductive metal core in a sleeving manner, a stainless steel connecting piece is arranged on the movable contact piece, a first movable contact and a second movable contact are arranged at two ends of the stainless steel connecting piece respectively, and a first static contact and a second static contact are respectively arranged on the first static contact piece and the second static contact piece correspondingly arranged below the first movable contact and the second movable contact. The movable contacts are adopted to be contacted with the static contacts in advance, so that the current is conducted in advance for arc extinguishing, and then the movable contact piece is contacted with the static contact piece to realize arcless contact; in a short time when the movable contact piece is separated from the static contact piece, the movable contacts are still contacted with the static contacts, that is, separation is delayed, and an arc extinction function is performed likewise, so that prolonging of the service life as well as reliable and safe working performance of the movable contact piece and the static contact piece is guaranteed.

In a liquid crystal display apparatus having a backlight disposed behind a liquid crystal display panel 10 , the liquid crystal display panel 10 has first and second substrates 11 and 21 disposed to face each other. The second substrate 21 has a common electrode 20 laid in a display area 12 thereon. The second substrate 21 further has a light-shielding inner black matrix 22 laid around the display area 12 and a light-shielding electrically insulated black matrix 22 A, 22 B, and 22 C laid outside the inner black matrix 22 and electrically separated from the inner black matrix 22 and the common electrode 19 . The liquid crystal display panel 10 is held, at the periphery thereof, by metal support frames 32 and 33.

The invention provides an inter-couple insulation state monitoring device using voltage measurement to obtain an insulation isopleths; the monitoring device is connected with a to-be-monitored dissimilar metal couple structure, and comprises the following units: a processing unit; a first controlled resistor unit with measuring resistance modules having different resistance values Rxi and connected between a first metal element and a second metal element in order; a measuring unit detecting voltage values Vi corresponding to each resistance value Rxi, wherein the processing unti obtains an actual measurement insulation isopleth, compares the actual measurement insulation isopleth with an alarm insulation isopleths, and determines the insulation state. In addition, the invention also provides the corresponding monitoring method. The method and device can monitor the insulation state of the dissimilar metal couple structure, can provide maintenance and replacement evidences for the inter-couple insulation material, and can be combined with the dissimilar metal inter-couple electric insulation technology, thus effectively reducing and preventing the dissimilar metal couple structure electrochemical corrosions.

The utility model relates to a preparation method for continuous hot dip tin using big diameter copper casting steel wire, which is mainly characterized in the following procedures. (1) Thick drawing: the high quality low carbon steel wire rod is drawn into coiled wire rod using a wire drawing machine; (2) Copper casting: the coiled wire rod is dried and heated in the heating furnace and then casts into a copper clad steel coiled wire rod roughcast in the power frequency copper casting furnace; (3) Thin drawing: the copper clad steel coiled wire rod roughcast is drawn into single strand copper casting steel wire by the wire drawing machine; (4) Heat treatment: the coiled wire rod is loaded to be heated in the vacuum annealing oven to get a single strand long length soft copper casting steel core wire; (5) Hot dip tin: dip the copper casting steel core wire which has been marinated in the zinc chloride solution into the tin liquid subsequently to get a single strand big diameter grounding steel wire. The hot dip tin copper casting grounding steel wire prolongs the service life compared with the prior copper casting steel core ground line because the dip tin copper casting grounding steel wire prolongs the complete corruption time of tin.

A semiconductor process includes the following steps. A dielectric layer having a recess is formed on a substrate. A barrier layer is formed to cover the recess, thereby the barrier layer having two sidewall parts. A conductive layer is formed on the barrier layer by an atomic layer deposition process, thereby the conductive layer having two sidewall parts. The two sidewall parts of the conductive layer are pulled down. A conductive material fills the recess and has a part contacting the two sidewall parts of the barrier layer protruding from the two sidewall parts of the conductive layer, wherein the equilibrium potential difference between the barrier layer and the conductive layer is different from the equilibrium potential difference between the barrier layer and the conductive material. Moreover, the present invention also provides a semiconductor structure formed by said semiconductor process.

The invention discloses a manufacturing method of a steel-aluminum composite section bar used for a contact rail in an urban railway system. The manufacturing method comprises the following steps: 1, molding an aluminum section bar substrate through an extrusion process; 2, molding an integrated stainless steel band crude blank through a rolling way; 3, hooking two sides of the stainless steel band crude blank at two sides of the aluminum section bar substrate; and 4, molding and wrapping a stainless steel band arranged on the aluminum section bar substrate through the rolling way and performing high-frequency heating on the molding part of the stainless steel band during the molding process. According to the invention, the integrated stainless steel band is adopted to replace two ''J''-shaped stainless steel band to hook the two sides of the aluminum section bar substrate, so that the contact surface of the contact rail and a current collector is ensured to be smooth, the electro erosion and the electric abrasion during the current collecting process is reduced, and the service lives of the contact rail and the current collector are prolonged.

The embodiment of the invention discloses a method for eliminating pinhole-shaped pock flaws on the surface of a pickling plate. The method comprises the steps that a plate blank is subjected to low-temperature tapping after being heated, and the tapping temperature is controlled to be 1160-1200 DEG C; the heated plate blank is subjected to rough rolling and finish rolling to obtain strip steel, wherein in the finish rolling process, the finishing rolling inlet temperature is controlled to be 950-1000 DEG C, and the final rolling temperature is controlled to be 830-870 DEG C; according to the thickness of the strip steel, the strip steel is subjected to pulling and straightening treatment, wherein in the pulling and straightening process, the pulling and straightening inserting amount of pulling and straightening equipment is set to be larger than 20 mm; and the pulled and straightened strip steel is subjected to pickling to obtain the pickling plate. By adoption of the method, the technical problem that pinhole-shaped pocks are prone to occurring on the surface of a hot rolling pickling plate is solved, and the technical effect of easily and effectively eliminating the pinhole-shaped pocks on the surface of the pickling plate is achieved.

In the invention, a high voltage end grading ring component, a high voltage arm unit, a low voltage end grading ring component, a low voltage arm unit and a pedestal are included. The low voltage armunit is arranged on the pedestal. A first insulation hollow casing pipe and a second insulation inner pipe are included. The second insulation inner pipe is arranged in the first insulation hollow casing pipe. The high voltage arm unit is arranged in the second insulation inner pipe. The pedestal is connected to the first insulation hollow casing pipe. The low voltage end grading ring component isarranged on one end of the first insulation hollow casing pipe. The high voltage end grading ring component comprises a first support, two grading ring groups fixed to the first support and a high voltage end terminal. The first support is arranged on the other end of the first insulation hollow casing pipe. The grading ring groups form a spherical or ellipsoidal envelope structure. The two endsof the high voltage arm unit are connected to the high voltage end terminal and the other end of the low voltage arm unit. In the invention, a field intensity near a high voltage end is uniformly distributed and local electric field intensity is reduced.

The invention discloses a motor insulation bearing chamber which is formed through connection of a bearing inner cover and a bearing outer cover. A bearing inner cover insulation layer made from non-conducting material is casted on the surface of the inner side of the bearing inner cover, which is contacted with a bearing, and a bearing outer cover insulation layer made from non-conducting material is casted on the surface of the inner side of the bearing outer cover, which is contacted with a bearing. With the adoption of the motor insulation bearing chamber, the problem that the current of a motor shaft is incompletely cut in the prior art is solved; and meanwhile, the motor insulation bearing chamber is convenient to be applied to a flame-proof type motor because an insulation material does not appear on a flame-proof surface.

The invention discloses a cathode boss structure of an aluminum electrolysis cell. Cathode bosses (2) are arranged on top surfaces of cathode carbon blocks (1) or are arranged on joint gaps (3) between every two cathode carbon blocks (1); the space between every two cathode bosses is between 400mm and 900mm; the full-length cathode bosses are 100mm to 250mm longer than the cathode carbon blocks, and the two end heads of the full-length cathode bosses are directly embedded in surrounding paste (5) on lateral parts; the mosaic butted cathode bosses have lengths of between 3,000mm and 3,200mm, the two end heads of the mosaic butted cathode bosses are fixed by using limiting carbon blocks (4) respectively, and the limiting carbon blocks are embedded in the surrounding paste (5) on the lateral parts; and the sections of the cathode bosses are of an oblong or isosceles trapezoid. The structure is suitable for all electrolysis cells at present. When an edge of a normal electrolysis cell is firmly bound, strip-shaped bosses are conveniently and quickly implanted into the upper surface of a cathode of the electrolysis cell to form a flow reduction effect, so that the flow velocity of a molten aluminum layer is reduced, energy dissipation of the molten aluminum layer is reduced, production stability of the electrolysis cell is enhanced, and energy consumption is reduced.

The invention provides a monitoring device for an inter-couple insulating state. The monitoring device is connected to a to-be-monitored dissimilar metal couple structure. The monitoring device comprises a switching unit, a detecting unit and a processing unit. The switching unit enables detecting resistors to be separately connected between a first metal component and a second metal component in a switching manner; the detecting unit detects the current of the detecting resistors; the processing unit receives the current values, acquires an equal insulating value curve according to resistance values and the current valves of the corresponding detecting resistors, compares the equal insulating value curve with a predetermined critical equal insulating value curve and judges the insulating state between the first metal component and the second metal component according to the comparison result. The invention also provides a corresponding monitoring method. According to the device and the method provided by the invention, the insulating state of the dissimilar metal couple structure can be monitored so as to provide a ground for maintenance and exchange of an inter-couple insulating material. By combined use with a dissimilar metal couple inter-couple insulating process, the electrochemical corrosion of the dissimilar metal couple structure can be effectively reduced and prevented.

The invention relates to an integrated temperature and liquid level acquiring and transmitting device for a regenerative heat exchange system. The device comprises a multipath electrode type liquid level acquiring probe, a multi-way NTC 10K thermal resistance acquiring probe and an integrated temperature and liquid level acquiring and transmitting controller. The device is in communication with anupper computer system through an RS485 serial communication interface, and the communication protocol is a standard modbus_RTU protocol. When multiple integrated temperature and liquid level acquiring and transmitting controllers are required for a combination use, the integrated temperature and liquid level acquiring and transmitting controllers can realize a modularized cascading expansion of atransmitter through a three-wire serial expansion bus, so that the number of nodes mounted on an RS485 serial bus is reduced, and the acquisition rate is improved. The electrode type liquid level acquiring probe adopts an n + 1 acquisition working mode, so that the paralysis of a whole liquid level electrode detection system due to a failure of a common electrode in the traditional sense is avoided.

An ultrasonic atomization generator comprises a unit shell body provided with a cavity and a transduction sheet contained inside the cavity of the unit shell body. A main electrode layer is arranged on the upper side face of the transduction sheet, a first electrode layer and a second electrode layer which are mutually and electrically isolated are arranged on the lower side face of the transduction sheet, and the second electrode layer is wound on the periphery of the first electrode layer and electrically connected with the main electrode layer. The ultrasonic atomization generator is characterized in that the ultrasonic atomization generator further comprises a first spiral conductive spring and a second spiral conductive spring, the tail end of the first spiral conductive spring and the tail end of the second spiral conductive spring are located inside the cavity, the second spiral conductive spring is wound on the outer side of the first spiral conductive spring and electrically isolated from the first spiral conducive spring, and the top end of the first spiral conductive spring and the top end of the second spiral conductive spring are arranged on the first electrode layer and the second electrode layer respectively and correspondingly in an abutting mode, wherein the first electrode layer and the second electrode layer are arranged on the lower side face of the transduction sheet. Due to the fact that the ultrasonic atomization generator has the characteristics and advantages, the ultrasonic atomization generator can be applied to ultrasonic atomization generator products.

The invention provides a structure of a pure oxygen generation assembly and a micro-oxygen therapeutic instrument comprising the pure oxygen generation assembly. The structure of the pure oxygen generation assembly comprises a gas end plate, a membrane electrode assembly, an oxygen end plate and a gas collection seat which are stacked sequentially and tightly wound into a whole by an insulating tape. The structure of the pure oxygen generation assembly is characterized in that the gas end plate is a hole-free end plate; a metallic gasket is arranged between the gas end plate and a cathode gas diffusion layer of the membrane electrode assembly; the thickness of the metallic gasket is less than that of the gas end plate; the areas of the gas end plate and the cathode gas diffusion layer are greater than that of the metallic gasket; and air channels are formed between the circumference of the metallic gasket and the gas end plate and between the circumference of the metallic gasket and the cathode gas diffusion layer. The structure of the pure oxygen generation assembly is advantageous in that, contact resistance is reduced, assembly input voltage is reduced, and current collection effect is improved, thereby slowing down electrochemical corrosion of the pure oxygen generation assembly and prolonging the service life of the pure oxygen generation assembly. The micro-oxygen therapeutic instrument can reach the expected service life, and avoids hidden dangers in use.

Embodiments of the invention provide a middle frame component and a production method thereof. The middle frame component is a support component which is in an electronic product and is used for supporting components of the electronic product. The middle frame component comprises a middle frame base material body, a first metal layer and an insulation passivation layer, wherein the first metal layer is attached to a first area of the middle frame base material body; a heat conductivity coefficient of the first metal layer is greater than a heat conductivity coefficient of the middle frame base material body; the first area includes all or parts of external surfaces of the middle frame base material body; the first metal layer is used for conducting heat generated by at least one component which is contacted with or adjacent to the first metal layer to the whole first metal layer and the middle frame base material body; and the insulation passivation layer is attached to a surface of the first metal layer. In the embodiments of the invention, heat dissipation performance of the middle frame component can be increased.

The invention discloses a neodymium-added Nd-Fe-B permanent-magnet material chemical plating solution and a use method. In the plating solution, nickel vitriol is used as the main salt, sodium hypophosphite is used as the reducer, sodium citrate or malic acid is used as the complexing agent, sodium acetate is used as the buffering agent, potash iodate is used as the stabilizing agent, and a small amount of neodymium is added. The use method comprises the following steps: the pH value of the chemical plating solution is adjusted by 5% to 10% of sodium hydroxide solution or ammonia to 9 to 10, the optimal pH value is 9 to 9.5, the plating solution is heated to 70 DEG C to 85 DEG C, the optimal constant temperature is 80 DEG C to 85 DEG C, oil-removed and activated Nd-Fe-B magnet is dipped into the plating solution, then a plating layer is acquired. According to the invention, because of the strong adsorption capacity, neodymium is aggregated on the surface of the magnet, the corrosion of neodymium-rich phase is inhabited, and the deposition speed is improved, the bonding force of the surface coating of the Nd-Fe-B magnet is obviously increased. In addition, coating got by the method has superior corrosion resistance, and the technical difficulty of poor bonding force of the surface coating of the Nd-Fe-B magnet is solved.

The invention relates to an apparatus and method for continuous desalination of seawater. A hydrophobic carbon-based composite film is prepared by compounding of a carbon-based material such as carbonnanotubes or graphene, and a hydrophobic polymer, a hydrophobic carbon-based composite film with a micro-nano multi-level pore structure is obtained through laser drilling, the surface is further coated with photo-thermal / electro-thermal responsive polymer molecules to enhance electro Joule heat and photo-thermal effects to improve an energy utilization rate, and finally a hydrophobic carbon-based composite film with multi-level pore structure and electro-thermal and photo-thermal effects is obtained. A corresponding device is designed to apply the hydrophobic carbon-based composite porous film to an electro-thermal / photo-thermal driven seawater desalination process, conditions are controlled to cause the hydrophobic carbon-based composite porous film to generate heat, the heat is used asa heat source to provide a driving force for mass transfer in a water phase change process, and condensation is performed to recover water vapor to finally realize seawater desalination. The method combines a thermal phase change process and a film method, and can realize continuous seawater desalination for 24 h alternately between electro-thermal and photo-thermal.

A composition for inhibiting the galvanic corrosion of printed circuit boards. The corrosion resistant coating composition may be applied to the printed circuit board to reduce corrosion and to shut down the chemical mechanism for galvanic corrosion so that corrosion protection of the product is achieved. The corrosion resistant coating composition comprises a) a mercaptan; b) an ethoxylated alcohol; and c) at least one metal species selected from the group consisting of molybdates, tungstates, vanadataes, zirconium, cobalt.

Relating to the technical field of corrosion prevention, the invention particularly discloses a composite material, a waterborne anticorrosive paint and a preparation method thereof. The composite material is prepared from g-C3N4 and sepiolite in a mass ratio of 1:0.5-10. The waterborne anticorrosive paint comprises a component A and a component B. Specifically, the component A comprises: the composite material, a curing agent, an anti-settling thixotropic agent, an anti-flash-rust agent and deionized water; the component B comprises: waterborne epoxy acrylic resin, a defoaming agent, a wetting dispersant, a levelling agent, an adhesion promoter and a curing agent. The anticorrosive paint prepared from g-C3N4 and modified sepiolite as the anticorrosive components has excellent salt spray resistance.