CN113980562B - Anchor chain anti-corrosion wear-resistant coating and preparation method thereof - Google Patents
Anchor chain anti-corrosion wear-resistant coating and preparation method thereof Download PDFInfo
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- CN113980562B CN113980562B CN202111397940.5A CN202111397940A CN113980562B CN 113980562 B CN113980562 B CN 113980562B CN 202111397940 A CN202111397940 A CN 202111397940A CN 113980562 B CN113980562 B CN 113980562B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/087—Coating with metal alloys or metal elements only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
Abstract
The invention belongs to the technical field of corrosion and protection, and particularly relates to an anchor chain anticorrosion wear-resistant coating and a preparation method thereof, wherein the process comprises four steps of pretreatment, preparation of a zinc-iron composite layer, preparation of a zinc-aluminum composite layer and preparation of an organic epoxy composite layer, a composite coating structure with 3 protective layers is adopted, and through a strict surface treatment process, the good combination of the coating and a substrate is ensured, so that the coating is not damaged by external force when being subjected to friction, collision and scraping, the corrosion resistance and wear resistance of the coating are improved, the problem that the coating with the complex structure of the anchor chain is difficult to coat is solved, and the coating does not fall off, bubble and rust does not occur after being soaked in a marine environment for 3 years relative to a substrate material; the coating has the advantages of simple structure, scientific and reliable principle, improvement of bonding strength and compatibility among coatings, realization of reliability of integral bonding of the coatings and excellent corrosion resistance and wear resistance of the coatings.
Description
The technical field is as follows:
the invention belongs to the technical field of corrosion and protection, and particularly relates to an anchor chain anticorrosion wear-resistant coating and a preparation method thereof, which can reduce the cost of ship anchor chain anticorrosion and prolong the service life.
Background art:
the anchor chain is a special chain which connects the anchor and the hull and transfers the holding force of the anchor, and comprises an anchor end chain link, a middle chain link and a tail end chain link, and when in anchoring, the self weight of the anchor chain can buffer the external force such as wind current and the like applied to the ship in water; the acting force of the anchor chain at the horizontal water bottom part on the anchor is kept horizontal, so that the anchor can reliably grab the bottom, and meanwhile, the anchor chain can provide a part of anchoring force due to the blocking effect of soil. The upper part of the anchor chain is washed by seawater and the friction of the ship body, and the lower part of the anchor chain is washed by silt, so that huge friction force is born. The anchor chain is in the severe sea conditions of stretching, abrasion and silt scouring for a long time, the corrosion problem is very serious, the anchor chain is not easy to overhaul, the surface treatment is carried out on the anchor chain, the corrosion resistance and the wear resistance are improved, and the method is a necessary means for prolonging the service life of the anchor chain.
The Marshide et al galvanize the anchor chain to improve the corrosion resistance and the antifouling performance of the anchor chain, and the field test result shows that the hot-dip galvanized anchor chain has no corrosion point in 3 years of soaking, the average zinc layer thickness is more than 100 mu m, but the abrasion occurs at the joint of two chain rings, which indicates that the hardness of the zinc-iron compound is still insufficient to resist the strong abrasion of the anchor chain, and the antifouling capacity is poor.
The anti-corrosion treatment method for the anchor chain disclosed in the Chinese patent 200810198218.7 comprises the following steps: (1) and (3) infiltration piece pretreatment: before zincification, oil removal, sand blasting and shot blasting are carried out, and oxide skin and old paint skin are removed, wherein the surface is required to be white and is in the color of a steel basic body; (2) charging: loading the workpiece and the powder zincizing agent into a roller of a mechanical energy permeation assisting device according to a certain proportion, sealing well, and installing the roller well; (3) and (3) heat treatment: starting the furnace to rotate the roller, heating while rotating, starting timing when the temperature of the furnace is raised to the specified zinc impregnation temperature, keeping the temperature and continuously rotating to finish heat diffusion in the roller; (4) discharging: keeping constant temperature for a specified time, stopping heating and rotating, hanging out of the roller, opening the furnace when the roller is naturally cooled to below 50 ℃, pouring into a vibrating screen, separating the component from the zinc impregnation agent, taking out the workpiece, washing with water, and removing residual zinc impregnation powder; (5) and (3) carrying out infiltration post-treatment: carrying out chromate treatment on the zincizing layer, soaking the zincizing layer in chromate treatment solution for several seconds, and airing the zincizing layer to enable a very small amount of active free zinc on the surface of the zincizing layer to form a chromate conversion coating with excellent corrosion resistance and strengthen the weather-proof and corrosion-proof protection effect of the zincizing layer; (6) coating a primer for two times on the surface of the primer sherardizing layer, wherein the recoating interval is not less than 6 hours; (7) painting anchor chain paint: painting two paint anchor chains, wherein the recoating interval is not less than 12 hours; a10-140 mu m zinc-impregnated layer is formed on the surface of the anchor chain through mechanical infiltration, and then a protective layer with good corrosion resistance is formed through chromic acid immersion passivation, the corrosion rate in seawater can be reduced to below 4 mu m/a, the corrosion resistance is good, however, the hardness of the zinc-impregnated layer is low, the working condition of high-frequency abrasion of the anchor chain is difficult to meet, and the service life is short.
The preparation method of the corrosion-resistant and wear-resistant ship anchor chain disclosed in the Chinese patent 201811144354.8 comprises the following steps: step 1, weighing the following components in parts by weight: 12-18 parts of titanium carbide, 25-45 parts of nano aluminum, 1-3 parts of silicon oxide, 25-45 parts of copper oxide, 1-8 parts of cobalt powder, 0.1-0.5 part of oxidized paraffin, 2-30 parts of tricalcium phosphate, 12-25 parts of carbon fiber, 3-8 parts of tungsten carbide, 2-5 parts of phenethyl alcohol, 1-5 parts of ethylene propylene diene monomer, 4-6 parts of silicon nitride, 1-3 parts of maleic anhydride and 25-35 parts of plant extract; step 2, mixing titanium carbide, silicon oxide, copper oxide, cobalt powder, tricalcium phosphate, tungsten carbide and silicon nitride, putting into a medium-frequency heating furnace, and heating and melting in a vacuum environment to obtain a mixed melt A; step 3, soaking the carbon fibers into the plant extract, and refrigerating at low temperature for 48 hours for later use; step 4, mixing maleic anhydride and phenethyl alcohol, uniformly stirring, adding the carbon fiber and the nano aluminum which are processed at low temperature, and putting the mixture into an extruder to extrude master batches for later use; step 5, adding the master batch into the mixed melt A, stirring, adding ethylene propylene diene monomer and oxidized paraffin, pouring the hot master batch into a mold of the anchor chain, which is coated with an anti-rust coating in advance, and demolding after curing to obtain the ship anchor chain; titanium carbide, nano aluminum, silicon oxide and organic matters are mixed and sintered to form a passivated ceramic layer, the unfired organic matters seal pores, and the whole coating plays a role in corrosion resistance and wear resistance; however, the method has the problems of complicated process, complex formula and adverse influence of high-temperature sintering on the mechanical properties of the anchor chain.
The lubricant suitable for the marine anchor chain disclosed in the Chinese patent 201811155335.5 comprises the following components in parts by mass: 20-32 parts of trimellitate, 12-14 parts of thioether phenol, 8-9 parts of octyl/butyl diphenylamine, 6-7 parts of butane, 10-20 parts of graphite, 5-6 parts of chloroprene rubber, 1.2-4 parts of antioxidant, 3-4 parts of film-forming auxiliary agent, 3-5 parts of penetrating agent, 1-7 parts of anti-corrosion additive and 8-9 parts of LPG propellant; the lubricating oil can lubricate the surface of an anchor chain, reduce the abrasion of the anchor chain, protect a passive film on the surface of the anchor chain and play roles in corrosion resistance and wear resistance, but the main role is wear reduction, and the effect in the corrosion resistance aspect is not ideal.
In the prior art, no effective anticorrosion and wear-resistant measures are available for ship anchor chains, the anchor chains are special in structure, the surface treatment process is more complicated due to the ring buckle structure, and no protection method with ideal anticorrosion and wear-resistant comprehensive performance exists for anchor chain treatment. Therefore, an anchor chain anticorrosion wear-resistant coating and a preparation method thereof are researched and designed to solve the problems.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and seeks to design an anchor chain anticorrosion wear-resistant coating and a preparation method thereof, based on a surface treatment process, the surface hardness and corrosion resistance of the anchor chain are improved, and the anticorrosion wear-resistant life of the anchor chain is prolonged.
In order to achieve the purpose, the anchor chain anticorrosion wear-resistant coating has a thickness of 50-300 μm, and a main structure shown in fig. 1, and comprises a zinc-iron composite layer, a zinc-aluminum composite layer and an organic epoxy composite layer, wherein the zinc-iron composite layer is arranged on the surface of an anchor chain substrate, the zinc-aluminum composite layer is arranged on the surface of the zinc-iron composite layer, and the organic epoxy composite layer is arranged on the surface of the zinc-aluminum composite layer; the thickness of the zinc-iron composite layer is 10-100 mu m, the preparation process comprises electroplating, chemical plating and hot infiltration, the thickness of the zinc-aluminum composite layer is 30-150 mu m, the preparation process comprises hot sintering, wherein the mass percentage of aluminum is 5-50%, and the thickness of the organic epoxy composite layer is 10-50 mu m.
The process of the anchor chain anticorrosion wear-resistant coating preparation method comprises four steps of pretreatment, zinc-iron composite layer preparation, zinc-aluminum composite layer preparation and organic epoxy composite layer preparation:
(I) pretreatment
Carrying out sand blasting activation on the surface of the anchor chain matrix 100 to ensure that the roughness of the anchor chain matrix is 20-80um, carrying out dust removal treatment after the surface is uniform and consistent and no visible attachments exist, wherein the pressure of compressed air for sand blasting activation is more than or equal to 0.6MPa, and the compressed air enters a spray gun after passing through an oil-water separator and a buffer tank with good performance;
(II) preparing a zinc-iron composite layer
Sequentially adding silicon dioxide, the pretreated anchor chain substrate, zinc powder and ammonium chloride into a zinc impregnation container with the temperature of 300-380 ℃, setting the heating temperature to 300-380 ℃, and the rotation speed to 5-30r/min, starting timing when the zinc impregnation container reaches the set temperature, stopping heating after 1.5h, opening the zinc impregnation container, standing to room temperature, closing the zinc impregnation container, heating again to raise the temperature to 400-410 ℃, and forming a zinc-iron composite layer on the surface of the anchor chain substrate; 4/5 of the total volume of the silicon dioxide, the pretreated anchor chain matrix, the zinc powder and the ammonium chloride in the volume of the sherardizing container, wherein the mass of the zinc powder is more than 300g/m 2 (surface area of anchor chain matrix), ammonium chloride accounts for 1.0-5wt% of total amount of silicon dioxide, zinc powder and ammonium chloride, and the balance is silicon dioxide;
(III) preparing a zinc-aluminum composite layer
(1) Dissolving 3-10 parts by mass of chromic anhydride in 100 parts by mass of water to prepare a chromic anhydride aqueous solution, adding 2-5 parts by mass of triethanolamine into the chromic anhydride aqueous solution, and standing for 24 hours to obtain a first solution;
(2) mixing an ethyl cellulose thickener with deionized water to prepare a solution II, wherein the total mass of the ethyl cellulose thickener and the deionized water is 100 parts;
(3) mixing 10-20 parts by mass of metal powder (comprising zinc powder, aluminum powder and zinc-aluminum powder) and 10-20 parts by mass of polyethylene glycol wetting agent, and stirring for wetting and dispersing to obtain a third solution;
(4) adding an auxiliary agent consisting of 1 part by mass of emulsified silicone oil, 1 part by mass of polypropylene glycol and 1 part by mass of triethanolamine into the third solution to obtain a fourth solution;
(5) adding the first solution into the fourth solution, stirring and mixing uniformly, and adding the second solution to obtain a fifth solution;
(6) stirring the solution V for more than 6 hours at the rotating speed of 10-30 r/min;
(7) firstly, carrying out sand blasting on an anchor chain matrix with a zinc-iron composite layer formed on the surface, after the thickness of the zinc-iron composite layer is reduced to 15 micrometers, coating a solution V stirred for more than 6 hours on the surface of the zinc-iron composite layer by adopting a dip-coating or brush coating method, drying for 15min at the temperature of 120 ℃ in a sintering furnace, then sintering for 30min at the temperature of 280 ℃, and finally cooling along with the furnace to form a zinc-aluminum composite layer with the thickness of 15 micrometers on the zinc-iron composite layer;
repeatedly brushing, drying and sintering to form two zinc-aluminum composite layers on the zinc-iron composite layer;
in order to avoid the adhesion phenomenon during the sintering of the anchor chain ring buckles (particularly universal joint components), the anchor chain ring buckles are sintered in a pendant mode, after being semi-dried, the anchor chain buckling parts are vacated in a flat paving mode, when the bonding occurs, the bonding parts are subjected to the operation of spraying sealing agent again, and then the sintering is continued until the complete curing occurs;
(IV) preparation of organic composite sealing layer 3
Spraying the diluted hole sealing agent on a zinc-aluminum composite layer to form an organic composite closed layer; the hole sealing agent comprises asphalt-based aluminum paste, aluminum-silicon-ketone resin, silicate, chromate inorganic matter, epoxy resin, polytetrafluoroethylene, fluorocarbon coating and the like; the pore sealing agent can be diluted to ensure that the pore sealing agent has good permeability.
Compared with the prior art, the composite coating structure with 3 protective layers is adopted, and a strict surface treatment process is adopted, so that the coating is well combined with a matrix, the coating is prevented from being damaged by external force when being rubbed, collided and scraped, the corrosion resistance and the wear resistance of the coating are improved, the problem that the coating with the anchor chain complex structure is difficult to coat is solved, and the coating does not fall off or bubble and is free of corrosion after being soaked in a marine environment for 3 years relative to a matrix material; the coating has the advantages of simple structure, scientific and reliable principle, improvement of bonding strength and compatibility among coatings, realization of reliability of integral bonding of the coatings and excellent corrosion resistance and wear resistance of the coatings.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a main body of an anti-corrosion wear-resistant coating of an anchor chain according to the present invention.
Fig. 2 is an appearance and appearance diagram of the treated anchor chain (right) and the untreated anchor chain (left) of the anti-corrosive wear-resistant coating of the anchor chain related to the invention.
FIG. 3 is a schematic diagram showing the hardness of the coating layer of the anchor chain treated by the anti-corrosive wear-resistant coating layer of the anchor chain according to the present invention.
FIG. 4 is a schematic view showing the coating wear behavior of the anchor chain treated with the anti-corrosive wear-resistant coating for the anchor chain according to the present invention.
FIG. 5 is a schematic view showing the wear profiles of the treated anchor chain (right) and the untreated anchor chain (left) of the anti-corrosive wear-resistant coating for anchor chains according to the present invention.
FIG. 6 is a schematic corrosion morphology of a treated anchor chain (right) and an untreated anchor chain (left) of the anti-corrosive wear-resistant coating of the anchor chain according to the present invention.
The specific implementation mode is as follows:
the invention is further described below by way of an embodiment example in conjunction with the accompanying drawings.
Example 1:
the main structure of the anchor chain anticorrosion wear-resistant coating comprises a zinc-iron composite layer 1, a zinc-aluminum composite layer 2 and an organic epoxy composite layer 3, wherein the zinc-iron composite layer 1 is arranged on the surface of an anchor chain substrate 100, the zinc-aluminum composite layer 2 is arranged on the surface of the zinc-iron composite layer 1, and the organic epoxy composite layer 3 is arranged on the surface of the zinc-aluminum composite layer 2; the thickness of the zinc-iron composite layer 1 is 15 mu m, the zinc-aluminum composite layer 2 is prepared by adopting an electroplating process, the thickness of the zinc-aluminum composite layer is 50 mu m, the mass ratio of aluminum is 15, and the thickness of the organic epoxy composite layer 3 is 20 mu m.
The anchor chain anticorrosion wear-resistant coating preparation method related to the embodiment comprises four steps of pretreatment, zinc-iron composite layer 1 preparation, zinc-aluminum composite layer 2 preparation and organic epoxy composite layer 3 preparation:
(I) pretreatment
Adopting brown corundum to carry out sand blasting activation on the surface of the anchor chain base body 100 to ensure that the roughness of the anchor chain base body is 65um, and carrying out dust removal treatment by adopting a dust collector after the surface is uniform and consistent and no visible attachments such as grease, dirt, oxide skin, paint coating and the like exist, wherein the pressure of compressed air for sand blasting activation is 0.6 MPa;
(II) preparing a zinc-iron composite layer 1
Sequentially adding 2 parts by mass of silicon dioxide, the pretreated anchor chain substrate 100, 15 parts by mass of zinc powder and 1 part by mass of ammonium chloride into a zincizing container at the temperature of 350 ℃, setting the heating temperature to be 380 ℃, and the rotating speed to be 15r/min, starting timing when the zincizing container reaches the set temperature, stopping heating after 1.5h, opening the zincizing container, standing to room temperature, closing the zincizing container, heating again to raise the temperature to 410 ℃, and forming a zinc-iron composite layer 1 on the surface of the anchor chain substrate 100;
(III) preparing a zinc-aluminum composite layer 2
(1) Dissolving 5 parts by mass of chromic anhydride in 100 parts by mass of water to prepare a chromic anhydride aqueous solution, adding 2 parts by mass of triethanolamine into the chromic anhydride aqueous solution, and standing for 24 hours to obtain a first solution;
(2) pre-dissolving 0.5 part by mass of an ethyl cellulose thickener in 99.5 parts by mass of deionized water to prepare a solution II;
(3) mixing 20 parts by mass of metal powder (comprising zinc powder, aluminum powder and zinc-aluminum powder) and 15 parts by mass of polyethylene glycol wetting agent, and stirring for wetting and dispersing to obtain solution III;
(4) adding an auxiliary agent consisting of 1 part by mass of emulsified silicone oil, 1 part by mass of polypropylene glycol and 1 part by mass of triethanolamine into the third solution to obtain a fourth solution;
(5) adding the first solution into the fourth solution, stirring and mixing uniformly, and adding the second solution to obtain a fifth solution;
(6) stirring the solution V for 6 hours at the rotating speed of 15 rpm;
(7) firstly, carrying out sand blasting on an anchor chain substrate 100 with a zinc-iron composite layer 1 formed on the surface, after the thickness of the zinc-iron composite layer 1 is reduced to 15 micrometers, coating a solution V stirred for more than 6 hours on the surface of the zinc-iron composite layer 1 by adopting a dip-coating or brush-coating method, placing the zinc-iron composite layer 1 in a sintering furnace, drying for 30min at the temperature of 120 ℃, then sintering for 20min at the temperature of 350 ℃, and finally cooling along with the furnace to form a zinc-aluminum composite layer 2 with the thickness of 20 micrometers on the zinc-iron composite layer 1;
repeatedly brushing, drying and sintering to form two zinc-aluminum composite layers 2 on the zinc-iron composite layer 1;
(IV) preparing an organic epoxy composite layer 3
Diluting the fluorocarbon sealant with tetrol into a sealant solution with the mass percentage concentration of 30 percent, and spraying the sealant solution on the zinc-aluminum composite layer 2 to form an organic epoxy composite layer 3.
The embodiment relates to a performance test of an anti-corrosion and wear-resistant coating of an anchor chain, the anchor chain treated by the anti-corrosion and wear-resistant coating of the anchor chain is compared with an untreated anchor chain, the appearance morphology is shown in figure 2, the coating hardness of the treated anchor chain is shown in figure 3, the coating hardness can reach more than 200HV, the coating wear behavior of the treated anchor chain is shown in figure 4, the wear morphology is shown in figure 5, the coating of the treated anchor chain is mainly in adhesive wear, compared with the untreated anchor chain, the wear resistance is improved by more than 3 times, the corrosion morphology is shown in figure 6, and the coating of the treated anchor chain is not corroded after 3000h of salt spray.
Claims (8)
1. The anchor chain anticorrosion wear-resistant coating is characterized in that a main body structure comprises a zinc-iron composite layer arranged on the surface of an anchor chain matrix, a zinc-aluminum composite layer arranged on the surface of the zinc-iron composite layer and an organic epoxy composite sealing layer arranged on the surface of the zinc-aluminum composite layer; the anchor chain anticorrosion wear-resistant coating preparation method comprises the following four steps of pretreatment, zinc-iron composite layer preparation, zinc-aluminum composite layer preparation and organic epoxy composite sealing layer preparation:
(I) pretreatment
Carrying out sand blasting activation on the surface of the anchor chain matrix to ensure that the roughness of the anchor chain matrix is 20-80 mu m, and carrying out dust removal treatment after the surface is uniform and consistent and no visible attachments exist;
(II) preparing a zinc-iron composite layer
Sequentially adding silicon dioxide, the pretreated anchor chain substrate, zinc powder and ammonium chloride into a zinc impregnation container at the temperature of 300-380 ℃, setting the heating temperature and the rotation speed, starting timing when the zinc impregnation container reaches the set temperature, stopping heating after 1.5h, opening the zinc impregnation container, standing to room temperature, closing the zinc impregnation container, heating again to raise the temperature to 400-410 ℃, and forming a zinc-iron composite layer on the surface of the anchor chain substrate;
(III) preparing a zinc-aluminum composite layer
(1) Dissolving chromic anhydride in water to prepare a chromic anhydride water solution, adding triethanolamine into the chromic anhydride water solution, and standing for 24 hours to obtain a first solution;
(2) mixing an ethyl cellulose thickener with deionized water to prepare a solution II;
(3) mixing metal powder with a polyethylene glycol wetting agent, and wetting and dispersing by stirring to obtain a third solution;
(4) adding an auxiliary agent consisting of emulsified silicone oil, polypropylene glycol and triethanolamine into the third solution to obtain a fourth solution;
(5) adding the first solution into the fourth solution, stirring and mixing uniformly, and adding the second solution to obtain a fifth solution;
(6) stirring the solution V for more than 6 hours at the rotating speed of 10-30 r/min;
(7) firstly, carrying out sand blasting on an anchor chain matrix with a zinc-iron composite layer formed on the surface, after the thickness of the zinc-iron composite layer is reduced to 15 micrometers, coating a solution V stirred for more than 6 hours on the surface of the zinc-iron composite layer by adopting a dip-coating or brush coating method, drying for 15min at the temperature of 120 ℃ in a sintering furnace, then sintering for 30min at the temperature of 280 ℃, and finally cooling along with the furnace to form a zinc-aluminum composite layer with the thickness of 15 micrometers on the zinc-iron composite layer; repeatedly brushing, drying and sintering to form two zinc-aluminum composite layers on the zinc-iron composite layer;
(IV) preparing the organic epoxy composite sealing layer
And spraying the diluted hole sealing agent solution on the zinc-aluminum composite layer to form an organic epoxy composite sealing layer.
2. The anti-corrosion wear-resistant coating for the anchor chain according to claim 1, wherein the preparation process of the zinc-aluminum composite layer comprises thermal sintering, wherein the mass percentage of aluminum is 5-50%, and the thickness of the organic epoxy composite sealing layer is 10-50 μm.
3. The anti-corrosion wear-resistant coating for anchor chains according to claim 1 or 2, wherein the pressure of compressed air for sand blast activation is 0.6MPa or more.
4. The anti-corrosion wear-resistant coating for the anchor chain as claimed in claim 1 or 2, wherein the heating temperature set in step (two) is 300-380 ℃ and the rotation speed is 5-30 r/min.
5. The corrosion-resistant and wear-resistant anchor chain coating of claim 1 or 2, wherein the total volume of the silica, the pretreated anchor chain substrate, the zinc powder and the ammonium chloride accounts for 4/5 of the volume of the zincizing container, and the mass of the zinc powder is more than 300g/m 2 Ammonium chloride accounts for 1.0-5wt% of the total amount of silica, zinc powder and ammonium chloride.
6. The anchor chain anticorrosion wear-resistant coating as claimed in claim 1 or 2, wherein the chromic anhydride in the chromic anhydride aqueous solution is 3-10 parts by mass, water is 100 parts by mass, and triethanolamine is 2-5 parts by mass; the total amount of the ethyl cellulose thickener and the deionized water is 100 parts by mass; 10-20 parts of metal powder and 10-20 parts of polyethylene glycol wetting agent; the silicone emulsion, polypropylene glycol and triethanolamine were all 1 part by mass.
7. The anti-corrosive wear-resistant coating for anchor chains as claimed in claim 6, wherein the metal powder comprises zinc powder, aluminum powder and zinc-aluminum powder.
8. The anchor chain anticorrosion wear-resistant coating according to claim 1 or 2, wherein the sealant solution has a concentration of 30% by mass.
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