CN113956741B - High corrosion resistance cutter for building - Google Patents
High corrosion resistance cutter for building Download PDFInfo
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- CN113956741B CN113956741B CN202111075753.5A CN202111075753A CN113956741B CN 113956741 B CN113956741 B CN 113956741B CN 202111075753 A CN202111075753 A CN 202111075753A CN 113956741 B CN113956741 B CN 113956741B
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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
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4407—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained by polymerisation reactions involving only carbon-to-carbon unsaturated bonds
- C09D5/4411—Homopolymers or copolymers of acrylates or methacrylates
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/16—Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/28—Implements for finishing work on buildings for glazing
- E04F21/32—Putty knives; Putty removers
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/10—Devices for levelling, e.g. templates or boards
Abstract
The invention relates to the technical field of building cutters, in particular to a high-corrosion-resistance building cutter, wherein a cutter body of the building cutter is made of nitrogen-containing martensitic stainless steel, and a corrosion-resistant coating is coated on the surface of the cutter body and is obtained by electrophoretic coating and depositing acrylate resin electrophoretic slurry on the surface of the cutter body and then heating and curing the electrophoretic slurry under the action of a curing agent. According to the invention, the nitrogen-containing martensitic stainless steel is selected as the material of the cutter body of the cutter for the building, the cost is similar to that of the currently commonly used 3Cr13, but the corrosion resistance of the cutter is obviously improved, and meanwhile, the acrylate resin coating is coated on the surface of the cutter, so that the corrosion resistance of the cutter is further enhanced, and the appearance effect of the cutter body is improved.
Description
Technical Field
The invention relates to the technical field of building cutters, in particular to a building cutter with high corrosion resistance.
Background
The plastering trowel and the putty knife are common cutters in buildings, and the cutter body of the plastering trowel and the putty knife is made of a steel sheet through stamping. The stainless steel used for the cutter bodies of the plastering trowels and the putty knives sold in the current market is mainly 3Cr13, the material belongs to martensitic stainless steel, and the martensitic stainless steel has certain corrosion resistance due to high carbon and chromium contents. However, the martensitic stainless steel is easy to be subjected to surface decarburization during the heat treatment process due to the high carbon content, and the high carbon content and the high chromium content are easy to generate component segregation during smelting to form chromium-rich eutectic carbides, so that a chromium-poor area is caused, corrosion is easy to occur in a humid environment, and the corrosion resistance of the martensitic stainless steel is weakened. The cutter bodies of the plastering trowel and the putty knife prepared by the method are easy to rust and corrode in actual use, so that the using effect of the product is poor and the problem of premature failure is caused.
Disclosure of Invention
The invention aims to provide a high-corrosion-resistance cutter for buildings, aiming at solving the problem that the existing cutter bodies of putty knives and plastering trowels are made of martensitic stainless steel, so that the putty knives and the plastering trowels are easy to rust and corrode in actual use.
The invention provides the following technical scheme:
a cutter body of the cutter for the building with high corrosion resistance is made of nitrogen-containing martensitic stainless steel.
The existing research shows that the corrosion resistance of the martensitic stainless steel can be improved by introducing nitrogen into the martensitic stainless steel, on one hand, due to the existence of the nitrogen, cr2N is preferentially precipitated in a stainless steel matrix, the precipitation amount of chromium-rich type common carbon compounds such as Cr23C6 in the stainless steel is inhibited, the loss of Cr element in the stainless steel matrix is reduced, a passive film containing the Cr element is favorably formed on the surface of the stainless steel, and the corrosion resistance of the stainless steel is improved; on the other hand, nitrogen, which is a gap strengthening element having a stronger action than carbon, has a smaller atomic radius so that it is dissolved in a matrix and also dissolved in a carbide in a small amount, and thus, the precipitation of a large amount of carbide along the grain boundary in the alloy can be effectively suppressed. The inventor finds that the nitrogen-containing martensitic stainless steel can obviously improve the corrosion resistance of a cutter body in the research of preparing a plastering cutter and a putty knife by using the nitrogen-containing martensitic stainless steel, and the nitrogen-containing martensitic stainless steel is applied to building cutters such as the plastering cutter and the putty knife for the first time from the viewpoint of the use material of the prior universal stainless steel plastering tool blade.
Preferably, the nitrogen content of the martensitic stainless steel containing nitrogen is 0.06-0.12% by mass. Too high a nitrogen content adversely affects the properties of the martensitic stainless steel.
In the present invention, the martensitic stainless steel containing nitrogen is preferably 2Cr13N. Compared with the existing common stainless steel 3Cr13, the 2Cr13N has a relatively close price, but the prepared cutter body has better corrosion resistance, so that the cost performance is higher.
Preferably, the surface of the cutter body of the cutter for the building is coated with a corrosion-resistant coating, and the corrosion-resistant coating is obtained by electrophoretic coating of acrylate resin electrophoretic slurry, deposition of the electrophoretic coating on the surface of the cutter body and heating and curing of the electrophoretic coating under the action of a curing agent;
the acrylate resin electrophoresis slurry is prepared by the following processes: heating butanol to 80-90 ℃, refluxing, stirring and dropwise adding styrene, n-butyl acrylate, ethyl methacrylate, propyl methacrylate, isooctyl ethyl acrylate, acrylic acid and an initiator under the protection of an inert atmosphere, preserving heat for 2-3 h, then dropwise adding acrylamide, preserving heat for 1-2 h, then adjusting the pH value to 7-8 to obtain a primary slurry, and adding water with the mass of 1.5-2 times of the primary slurry to adjust the solid content to obtain the acrylate resin electrophoretic slurry. At present, metal parts and stainless steel parts are coated with organic polymer film layers to improve the protection performance, for example, the corrosion resistance is a common method, the protection effect is good, and the decorative function is realized. The types of organic polymeric resins commonly used are mainly polyurethanes, epoxies and acrylates. For the cutter for building, although the epoxy resin has high corrosion resistance, the epoxy resin generally contains variegated colors to influence the color of the surface of the cutter; polyurethanes, however, have a very good flexibility but not a high hardness, which is necessary in view of the need for the tools to be troweled, cement, paint, etc. Therefore, the coating is integrally considered, the coating is coated by the acrylate coating, not only has certain corrosion resistance, but also has higher color effect, and is very suitable for products with obvious appearance, such as building cutters, and the coating thickness is 5-15 mu m.
Preferably, in the acrylate resin electrophoretic slurry, the components in parts by weight are as follows: 80-100 parts of butanol, 10-15 parts of styrene, 20-23 parts of n-butyl acrylate, 13-16 parts of ethyl methacrylate, 15-19 parts of propyl methacrylate, 10-12 parts of isooctyl ethacrylate, 15-20 parts of acrylic acid, 1-1.5 parts of initiator and 5-10 parts of acrylamide. The acrylic resin coating is easy to have the phenomena of brittle film layer, poor binding force and the like in the curing process, and the phenomena are in large relation with the components and the dosage of the acrylic resin. Therefore, it is necessary to properly optimize the amount of each component.
Preferably, the curing agent is an isocyanate curing agent; the curing temperature is 100-106 ℃, and the holding time is 30-40 min. The isocyanate curing agent can coexist with active groups such as carboxyl, amino and the like at normal temperature, and can be subjected to crosslinking reaction with the active groups after being heated, so that the curing of the acrylate resin electrophoretic slurry is realized, and the adhesive force of the acrylic resin coating is modified, wherein the curing agent can be selected from isophorone diisocyanate and the like.
In the invention, the acrylate resin electrophoresis slurry further contains hydrophilic fumed silica, the addition amount of the hydrophilic fumed silica is 2-3% of the mass of the initial slurry, and the hydrophilic fumed silica is added before the initiator is added dropwise. The hydrophilic gas-phase silicon dioxide has strong dispersing performance, can be uniformly dispersed into the acrylate resin electrophoresis slurry to be used as a filler, has the effects of thickening and not strong, and improves the corrosion resistance, the wear resistance, the adhesive force and the flexibility of the coating.
Preferably, the hydrophilic fumed silica is used after being treated by the following steps: dispersing hydrophilic fumed silica into an aqueous solution of a primary amino alkoxy silane coupling agent, heating, stirring, standing, filtering and drying with cold air; the mass ratio of the hydrophilic fumed silica to the primary amino alkoxy silane coupling agent is 80-90. When the coating is cured, the coating is firstly kept for 1 to 2 hours at a temperature of between 60 and 65 ℃ in an inert atmosphere, and then the temperature is raised for curing. Although the hydrophilic fumed silica surface is also rich in hydroxyl structures and has the possibility of participating in the crosslinking reaction under the action of the crosslinking agent in the polymerization of acrylate monomers, on one hand, the hydroxyl groups are distributed on the silica surface and have short chains and low probability of participating in the crosslinking reaction, and on the other hand, even if the hydroxyl groups are distributed on the silicon surface, the extension of the crosslinking reaction is limited, namely, the hydroxyl groups are distributed on the silica surface to limit the participation in the crosslinking reaction. Therefore, through research, the inventor puts hydrophilic fumed silica into an aqueous solution of amino alkoxy silane, the amino alkoxy silane is hydrolyzed, the alkoxy is replaced by hydroxyl, hydroxyl is introduced to the silane, and the hydroxyl reacts with the hydroxyl on the surface of the hydrophilic fumed silica, so that an amino-containing silane structure is introduced to the surface of the hydrophilic fumed silica, and a plurality of amino-containing silane structures can be simultaneously introduced to the surface of the fumed silica, so that the fumed silica participates in a crosslinking reaction through the amino and can form three-dimensional crosslinking, the capability of the fumed silica participating in the crosslinking curing reaction is greatly improved, the adhesive force and compactness of a cured coating are greatly improved, and the brittleness of the coating is improved.
As a preferred feature of the present invention, the primary aminoalkoxysilane coupling agent is N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane NH 2 (CH 2 ) 3 NH(CH 2 ) 2 Si(OCH 3 ) 3 N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane NH 2 (CH 2 ) 3 NH(CH 2 ) 2 Si(OCH 2 CH 3 ) 3 Gamma-aminopropyltrimethoxysilane NH 2 (CH 2 ) 3 Si(OCH 3 ) 3 Gamma-aminopropyltriethoxysilane NH 2 (CH 2 ) 3 Si(OCH 2 CH 3 ) 3 At least one of (1).
Preferably, the cutter for construction is a trowel or a putty knife.
The invention has the following beneficial effects:
according to the invention, the nitrogen-containing martensitic stainless steel is selected as the material of the cutter body of the cutter for the building, the cost is similar to that of the currently commonly used 3Cr13, but the corrosion resistance of the cutter is obviously improved, and meanwhile, the acrylate resin coating is coated on the surface of the cutter, so that the corrosion resistance of the cutter is further enhanced, and the appearance effect of the cutter body is improved.
Drawings
FIG. 1 is a graph of the results after the putty knife salt spray test prepared in example 1.
Fig. 2 is a graph showing the results of the putty knife salt spray test prepared in comparative example 1.
Fig. 3 is a graph showing the results after the putty knife salt spray test prepared in comparative example 2.
Detailed Description
The following further describes the embodiments of the present invention.
The starting materials used in the present invention are commercially available or commonly used in the art unless otherwise specified, and the methods in the following examples are conventional in the art unless otherwise specified.
To maintain consistency, the surface silicon hydroxyl group density SiOH/nm of the hydrophilic fumed silicas used in the examples and comparative examples described below 2 Was 3 (average).
Example 1
A putty knife, which is 4 inches in size, is made by punching a steel coil of nitrogen-containing martensitic stainless steel 2Cr13N.
Example 2
A putty knife, embodiment 1 difference is, this putty knife is still through electrophoretic coating processing after stamping forming, electrophoretic coating is acrylate resin electrophoretic slurry, curing agent is isophorone diisocyanate, the coating thickness is 10 mu m, add curing agent into acrylate resin electrophoretic slurry to mix during electroplating and then add into the electroplating bath electrophoretic coating, operating voltage 180V, take out and toast 40min at 100 ℃.
The acrylate resin electrophoresis slurry is prepared by the following steps:
heating 80 parts (by weight, the same below) of butanol to 80 ℃ and refluxing, stirring and sequentially dropwise adding 10 parts of styrene, 20 parts of n-butyl acrylate, 13 parts of ethyl methacrylate, 15 parts of propyl methacrylate, 10 parts of isooctyl ethyl acrylate, 15 parts of acrylic acid and 1 part of azodiisobutyronitrile serving as an initiator under the protection of nitrogen, preserving heat for 3 hours, dropwise adding 5 parts of acrylamide and preserving heat for 1 hour, then adjusting the pH value to 7 to obtain a primary slurry, and adding water with the mass 1.5 times that of the primary slurry to adjust the solid content to obtain the acrylate resin electrophoretic slurry.
Example 3
Unlike example 2, the acrylate resin electrophoretic paste was prepared by the following process:
heating 100 parts of butanol to 90 ℃ and refluxing, stirring and sequentially dropwise adding 12 parts of styrene, 23 parts of n-butyl acrylate, 16 parts of ethyl methacrylate, 19 parts of propyl methacrylate, 12 parts of isooctyl ethyl acrylate, 20 parts of acrylic acid and 1.5 parts of initiator azobisisobutyronitrile under the protection of nitrogen, preserving heat for 2 hours, then dropwise adding 10 parts of acrylamide and preserving heat for 2 hours, then adjusting the pH value to 8 to obtain a primary slurry, and adding 2 times of water by mass of the primary slurry to adjust the solid content to obtain the acrylate resin electrophoresis slurry.
Example 4
The acrylate resin electrophoretic slurry is prepared by the following processes:
heating 100 parts of butanol to 85 ℃ and refluxing, stirring and sequentially dropwise adding 15 parts of styrene, 21 parts of n-butyl acrylate, 15 parts of ethyl methacrylate, 17 parts of propyl methacrylate, 10 parts of isooctyl ethyl acrylate, 16 parts of acrylic acid and 1.4 parts of azodiisobutyronitrile serving as an initiator under the protection of nitrogen, preserving heat for 3 hours, then dropwise adding 7 parts of acrylamide and preserving heat for 1 hour, then adjusting the pH value to 8 to obtain a primary slurry, and adding 2 times of water by mass of the primary slurry to adjust the solid content to obtain the acrylate resin electrophoretic slurry.
Example 5
The difference from example 2 is that the acrylate resin electrophoretic slurry is prepared by adding hydrophilic fumed silica with the mass of 2% of that of the initial slurry and adding the hydrophilic fumed silica before the initiator is added.
Example 6
The difference from example 2 is that hydrophilic fumed silica with initial slurry mass of 3% is also added in the preparation of the acrylate resin electrophoretic slurry and added before the initiator is added.
Example 7
The difference from example 5 is that the hydrophilic fumed silica is used after being treated by the following procedure: dispersing hydrophilic gas-phase silicon dioxide into an aqueous solution of gamma-aminopropyltriethoxysilane (the concentration of a silane coupling agent is 1 mol/L), stirring at 1000rpm for 90min, mixing, standing for 2h, filtering and drying by cold air; the mass ratio of the hydrophilic fumed silica to the gamma-aminopropyltriethoxysilane is 8;
during curing, the mixture is firstly cured for 2 hours at 60 ℃ in a nitrogen atmosphere, and then is heated to 100 ℃ for baking and curing.
Example 8
The difference from example 5 is that the hydrophilic fumed silica is used after being treated by the following procedure: dispersing hydrophilic fumed silica into an aqueous solution of N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane (the concentration of a silane coupling agent is 1 mol/L), stirring at 1000rpm for 90min, mixing, standing for 2h, filtering, and drying with cold air, wherein the mass ratio of the hydrophilic fumed silica to the N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane is 30.
Comparative example 1
The putty knife was 4 inches in size but was stamped from a coil of martensitic stainless steel 3Cr 13.
Comparative example 2
The putty knife was 6 inches in size but was stamped from a coil of martensitic stainless steel 3Cr 13.
Comparative example 3
This comparative example differs from example 2 in that the addition of propyl methacrylate is omitted and replaced by an equal amount of ethyl methacrylate.
Comparative example 4
This comparative example differs from example 5 in that instead of the hydrophilic fumed silica, an equivalent amount of hydrophobic fumed silica is added, the surface silicon hydroxyl group density of which hydrophobic fumed silica is SiOH/nm 2 It was 0.8 (average).
Comparative example 5
This comparative example is different from example 7 in that hydrophilic fumed silica and gamma-aminopropyltriethoxysilane were simultaneously added to an acrylate resin electrophoretic paste.
Comparative example 6
This comparative example differs from example 7 in that the hydrophilic fumed silica is treated with a vinyltriethoxysilane coupling agent instead of gamma-aminopropyltriethoxysilane.
Performance testing
1. Corrosion resistance of cutter body material
The putty knife prepared in example 1 and comparative examples 1 and 2 was placed in a salt spray test box using a 1wt% aqueous solution of NaCl, held at 35 deg.C for 48 hours, and then photographed for observation, and the results are shown in FIGS. 1 to 3.
As can be seen from the figure, the surface of the putty knife obtained in example 1 is substantially free of rust, while the surfaces of the putty knives prepared in comparative examples 2 and 3 form continuous rust and are severely corroded.
2. Corrosion resistance of coating film
Referring to the method of GB/T1771-2007, the putty knives obtained in examples 2-8 and the putty knives obtained in comparative examples 3-6 were cross-scribed with a fine art blade on the back side and penetrated through the coating layer at a distance of more than 25mm from the edge and a width of 0.1mm, and then the putty knives and the putty knives of example 1 were placed in a salt spray box with a concentration of 5% NaCl aqueous solution, kept at a temperature of 35 + -2 deg.C and with the scribing line facing upwards and inclined at an angle of 45 deg. to perform a salt spray test, wherein the salt spray settling amount was 1.5 + -0.2 mL/(80 cm) 2 H), observing the surface appearance of each putty knife every 12h, such as rusting and blistering, recording the time when rusting occurs, and stopping the test until 240 h.
3. Impact resistance test of coating film
The drop weight was adjusted upward at 5cm intervals to crack, wrinkle, and peel, with the impact height of 40cm as a reference, according to standard GB/T1732-2020, and then drop-back testing was performed at 1cm intervals.
The results of the above tests are shown in Table 1.
TABLE 1 test Performance of examples 1 to 8 and comparative examples 3 to 6
It can be seen from the above table that the corrosion resistance of the cutter body can be effectively improved after the cutter body is plated with the appropriate acrylate resin coating, wherein the corrosion resistance and the brittleness of the acrylate resin coating have a great relationship with the composition of the acrylate resin coating. Hydrophilic fumed silica is introduced into the acrylate resin slurry, and particularly the modified hydrophilic fumed silica is favorable for improving the corrosion resistance, improving the toughness of the coating and improving the brittleness. The inorganic filler is directly filled, for example, hydrophobic fumed silica can improve the corrosion resistance to a certain degree, but the toughness modification effect is not obvious, and the corrosion resistance effect is lower than that of hydrophilic fumed silica.
Claims (6)
1. The building cutter with high corrosion resistance is characterized in that the cutter body of the building cutter is made of nitrogen-containing martensitic stainless steel;
the corrosion-resistant coating is formed by coating and depositing an acrylate resin electrophoretic slurry on the surface of the cutter body through electrophoresis and then heating and curing the electrophoretic slurry under the action of a curing agent;
the acrylate resin electrophoresis slurry is prepared by the following processes: heating 80-100 parts by weight of butanol to 80-90 ℃ and refluxing, stirring and dropwise adding 10-15 parts of styrene, 20-23 parts of n-butyl acrylate, 13-16 parts of ethyl methacrylate, 15-19 parts of propyl methacrylate, 10-12 parts of isooctyl ethyl acrylate, 15-20 parts of acrylic acid and 1-1.5 parts of initiator under the protection of inert atmosphere, preserving heat for 2-3 hours, dropwise adding 5-10 parts of acrylamide and preserving heat for 1-2 hours, then adjusting the pH value to 7-8 to obtain a primary slurry, and adding 1.5-2 times of water by mass of the primary slurry to adjust the solid content to obtain an acrylate resin electrophoretic slurry;
the acrylate resin electrophoresis slurry also contains hydrophilic fumed silica, the addition amount of the hydrophilic fumed silica is 2-3% of the mass of the initial slurry, and the hydrophilic fumed silica is added before the initiator is added dropwise;
the hydrophilic fumed silica is used after being treated by the following steps: dispersing hydrophilic fumed silica into an aqueous solution of a primary amino alkoxy silane coupling agent, stirring and mixing, standing, filtering and drying by cold air;
the mass ratio of the hydrophilic fumed silica to the primary amino alkoxy silane coupling agent is 80-90;
the primary amino alkoxy silane coupling agent is at least one of N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane, gamma-aminopropyltrimethoxysilane and gamma-aminopropyltriethoxysilane;
the average value of the hydroxyl group density of the hydrophilic gas-phase nano silicon dioxide is 3 SiOH/nm 2 。
2. The high corrosion resistance construction cutter according to claim 1, wherein the nitrogen content in the nitrogen-containing martensitic stainless steel is 0.06 to 0.12% by mass.
3. The high corrosion resistance construction cutter according to claim 1 or 2, wherein the nitrogen-containing martensitic stainless steel is 2Cr13N.
4. The high corrosion resistance construction cutter according to claim 1, wherein the curing agent is an isocyanate-based curing agent.
5. The high corrosion resistance building tool according to claim 4, wherein the temperature for heat curing is 100 to 106 ℃ and the holding time is 30 to 40min.
6. The tool for construction with high corrosion resistance according to claim 1, wherein the tool for construction is a trowel or putty knife.
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| 纳米SiO2改性阴极电泳漆的制备及耐蚀性研究;黄娇等;《电镀与精饰》;20120215;第34卷(第2期);第43-46页 * |
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