CN113186423A - Lead-free corrosion-resistant bronze alloy - Google Patents
Lead-free corrosion-resistant bronze alloy Download PDFInfo
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- CN113186423A CN113186423A CN202110394366.1A CN202110394366A CN113186423A CN 113186423 A CN113186423 A CN 113186423A CN 202110394366 A CN202110394366 A CN 202110394366A CN 113186423 A CN113186423 A CN 113186423A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 82
- 230000007797 corrosion Effects 0.000 title claims abstract description 81
- 229910000906 Bronze Inorganic materials 0.000 title claims abstract description 73
- 239000000956 alloy Substances 0.000 claims abstract description 52
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 229910052718 tin Inorganic materials 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 24
- 239000003822 epoxy resin Substances 0.000 claims description 17
- 229920000647 polyepoxide Polymers 0.000 claims description 17
- 239000004925 Acrylic resin Substances 0.000 claims description 16
- 229920000178 Acrylic resin Polymers 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- 125000005442 diisocyanate group Chemical group 0.000 claims description 14
- 229920000459 Nitrile rubber Polymers 0.000 claims description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 12
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 12
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 12
- 239000011256 inorganic filler Substances 0.000 claims description 8
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 8
- 239000012745 toughening agent Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000003651 drinking water Substances 0.000 abstract description 7
- 235000020188 drinking water Nutrition 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000035622 drinking Effects 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 23
- 239000010949 copper Substances 0.000 description 15
- 241000282414 Homo sapiens Species 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 229910000881 Cu alloy Inorganic materials 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
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- 230000000379 polymerizing effect Effects 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention belongs to the technical field of alloy materials, and particularly relates to a lead-free corrosion-resistant bronze alloy. The invention provides a lead-free corrosion-resistant bronze alloy aiming at the problem of how to develop a lead-free bronze alloy for manufacturing a faucet and a water meter in a drinking water system in the prior art, which is to be solved urgently in the current metal material industry, and the lead-free corrosion-resistant bronze alloy comprises an alloy body and a corrosion-resistant coating coated on the surface of the alloy body, wherein the alloy body comprises main components of Cu, Sn, Ni and Bi and impurity components of Fe, P, Sb, Zr, Al and Zn, the total mass fraction of the impurity components in the alloy body is less than 1%, and the bronze alloy does not contain Pb. The invention provides a bronze alloy without lead, which can be applied to a faucet and a water meter in a drinking system to ensure the safety of drinking water.
Description
Technical Field
The invention belongs to the technical field of alloy materials, and particularly relates to a lead-free corrosion-resistant bronze alloy.
Background
The lead brass has excellent mechanical property and physical property, good casting property and cutting property, and low price, so the lead brass is widely applied to instruments, electronics, electric appliances, daily hardware, drinking water systems and the like, and particularly the production and application amount of Hpb59-1 are the largest.
However, lead and its compound are one of 17 chemical substances which seriously harm human life and natural environment, lead in the alloy is easy to be invaded or removed from the matrix during the use process, lead in industrial waste gas products permeates into a ground water system, and lead in various forms enters into food chains of animals or human beings through various ways, thus being harmful to human health and influencing the environment. In recent years, medical experts in various countries in the world have found that lead-containing copper alloys pose threats to human health and environmental hygiene, and medical institutions such as the european union, the united states, japan, and china have reported that lead-containing copper alloys pose hazards to the human environment. In view of the harm of lead to the human health environment, the U.S., japan and countries of the european union have successively issued government regulations for the application of lead-containing copper alloys, and the chinese government has issued mandatory regulations such as "electronic information product pollution control management method" in conformity with the international regulations, and the strict regulations for the lead content in copper alloys (wherein the lead content in electronic information products must be less than 0.1%) and the lead leaching amount in drinking water (japan must be less than 0.01mg/L, and us must be less than 0.0011%) are respectively issued, and the lead content therein will be continuously reduced, and the application of lead-containing copper alloys is facing strict limitations and challenges, and the prospect will be more serious, therefore, how to develop a lead-free bronze alloy for manufacturing faucets and water meters in drinking water systems is an urgent problem to be solved for the current metallic material industry.
For example, the chinese invention patent application discloses a tin-lead bronze alloy [ application No.: 201510028376.8], the tin-lead bronze alloy in the patent application comprises the following components in percentage by mass: 80 percent of Cu, 9 to 11 percent of Sn, 8 to 10 percent of Pb, less than or equal to 0.01 percent of Al, less than or equal to 0.25 percent of Fe, less than or equal to 0.20 percent of Mn, less than or equal to 2.00 percent of Ni, less than or equal to 0.10 percent of P, less than or equal to 0.10 percent of S, less than or equal to 0.50 percent of Sb, less than or equal to 0.01 percent of Si, and less than or equal to 2.00 percent of Zn.
The invention has the advantages of good mechanical property and processing property, but the components of the invention contain a large amount of lead, so the problems still exist.
Disclosure of Invention
The invention aims to solve the problems and provide a lead-free corrosion-resistant bronze alloy which does not contain lead and does not pollute water.
A lead-free corrosion-resistant bronze alloy, which comprises an alloy body and a corrosion-resistant coating coated on the surface of the alloy body, wherein the alloy body comprises main components of Cu, Sn, Ni and Bi and impurity components of Fe, P, Sb, Zr, Al and Zn, the total mass fraction of the impurity components in the alloy body is less than 1%, and the bronze alloy does not contain Pb.
In the above lead-free corrosion-resistant bronze alloy, the total mass fraction of Cu in the alloy body is 70% or more.
In the lead-free corrosion-resistant bronze alloy, the alloy body comprises, by mass, 8% -12% of Sn, 1% -3% of Ni, 5% -8% of Bi, 0.01% -0.02% of Fe, 0.10% -0.25% of P, 0.05% -0.20% of Sb, 0.10% -0.30% of Zr, 0.01% -0.10% of Al, 0.02% -0.08% of Zn and the balance of Cu.
In the above-described lead-free corrosion-resistant bronze alloy, the alloy body includes, in mass fractions, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn, and the balance Cu, respectively.
In the above-mentioned lead-free corrosion-resistant bronze alloy, the corrosion-resistant coating includes an epoxy resin, an acrylic resin, a corrosion-resistant aid, an inorganic filler, and a toughening agent.
In the above-described lead-free corrosion-resistant bronze alloy, the corrosion-resistant auxiliary agent includes diisocyanate, silica powder, and polymethyl methacrylate.
In the lead-free corrosion-resistant bronze alloy, the corrosion-resistant coating comprises, by mass, 30-40 parts of epoxy resin, 60-80 parts of acrylic resin, 5-15 parts of diisocyanate, 1-5 parts of silica powder, 1-2 parts of polymethyl methacrylate, 10-40 parts of inorganic filler and 1-10 parts of toughening agent.
In the above-described lead-free corrosion-resistant bronze alloy, the corrosion-resistant coating includes, by mass, 35 parts of an epoxy resin, 70 parts of an acrylic resin, 10 parts of a diisocyanate, 3 parts of a silica powder, 1.5 parts of polymethyl methacrylate, 25 parts of an inorganic filler, and 5 parts of a toughening agent, respectively.
In the above-described lead-free corrosion-resistant bronze alloy, the inorganic filler includes calcium carbonate powder.
In the above lead-free corrosion-resistant bronze alloy, the toughening agent comprises a carboxyl liquid nitrile rubber.
Compared with the prior art, the invention has the advantages that:
1. the invention provides a bronze alloy without lead, which can be applied to a faucet and a water meter in a drinking system to ensure the safety of drinking water.
2. The bronze alloy provided by the invention is also provided with the corrosion-resistant coating on the surface of the alloy body, has better acid resistance and alkali resistance, and prolongs the service life of the product.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example 1
The present embodiment provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating applied to a surface of the alloy body.
The alloy body comprises, by mass, 8% of Sn, 1% of Ni, 5% of Bi, 0.01% of Fe, 0.10% of P, 0.05% of Sb, 0.10% of Zr, 0.01% of Al, 0.02% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 40 parts of epoxy resin, 60 parts of acrylic resin, 5 parts of diisocyanate, 1 part of silicon dioxide powder, 1 part of polymethyl methacrylate, 10 parts of calcium carbonate powder and 1 part of carboxyl liquid nitrile rubber.
The epoxy resin is a high molecular polymer with a molecular formula of (C)11H12O3)nIs referred to asThe generic name of a class of polymers containing more than two epoxy groups in the molecule. It is a polycondensation product of epichlorohydrin and bisphenol A or a polyol.
Diisocyanates are a special class of chemicals having-N ═ C ═ O functional groups, which are used primarily as raw materials for the manufacture of polyurethane materials. The polyurethane material is prepared by polymerizing diisocyanate and polyether polyol or polyester polyol, has no yellowing and good application performance, and is widely used as industrial and automobile polyurethane coatings.
Example 2
The present embodiment provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating applied to a surface of the alloy body.
The alloy body comprises 12 mass percent of Sn, 3 mass percent of Ni, 8 mass percent of Bi, 0.02 mass percent of Fe, 0.25 mass percent of P, 0.20 mass percent of Sb, 0.30 mass percent of Zr, 0.10 mass percent of Al, 0.08 mass percent of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 30 parts of epoxy resin, 80 parts of acrylic resin, 15 parts of diisocyanate, 5 parts of silicon dioxide powder, 2 parts of polymethyl methacrylate, 40 parts of calcium carbonate powder and 10 parts of carboxyl liquid nitrile rubber.
Example 3
The present embodiment provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating applied to a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 10 parts of diisocyanate, 3 parts of silicon dioxide powder, 1.5 parts of polymethyl methacrylate, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 1
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 2
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 10 parts of diisocyanate, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 3
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 3 parts of silicon dioxide powder, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 4
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 1.5 parts of polymethyl methacrylate, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 5
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 3 parts of silicon dioxide powder, 1.5 parts of polymethyl methacrylate, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 6
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 10 parts of diisocyanate, 1.5 parts of polymethyl methacrylate, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Comparative example 7
The present comparative example provides a lead-free corrosion-resistant bronze alloy including an alloy body and a corrosion-resistant coating coated on a surface of the alloy body.
The alloy body comprises, by mass, 10% of Sn, 2% of Ni, 6.5% of Bi, 0.015% of Fe, 0.20% of P, 0.15% of Sb, 0.20% of Zr, 0.05% of Al, 0.05% of Zn and the balance of Cu.
The corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 10 parts of diisocyanate, 3 parts of silicon dioxide powder, 25 parts of calcium carbonate powder and 5 parts of carboxyl liquid nitrile rubber.
Application example 1
A faucet 1 was produced from the lead-free corrosion-resistant bronze alloy described in example 3;
purchase faucet 2, a commercially available product;
the water faucet 1 and the water faucet 2 are respectively installed on two water outlets of the same water outlet pipeline, namely the water faucet 1 is installed at the water outlet 1, and the water faucet 2 is installed at the water outlet 2. The lead content of the effluent water at the water gap 1 and the water outlet 2 is respectively detected, and the results are shown in the following table:
| experimental group | Lead content (μ g/L) |
| Water outlet 1 | Not detected out |
| Water outlet 2 | 9.6 |
And (4) analyzing results: from the experimental data, the lead content of the faucet prepared from the lead-free bronze alloy provided by the invention is obviously reduced, namely, the lead-free bronze alloy provided by the invention is suitable for manufacturing the faucet, the water meter and other devices in a drinking water system, and the expected purpose of the invention is achieved.
Application example 2
Bronze alloy 1 was prepared from the lead-free corrosion-resistant bronze alloy described in example 3;
bronze alloy 2 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 1;
bronze alloy 3 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 2;
bronze alloy 4 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 3;
bronze alloy 5 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 4;
bronze alloy 6 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 5;
bronze alloy 7 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 6;
bronze alloy 8 was prepared from the lead-free corrosion-resistant bronze alloy described in comparative example 7;
comparative experiment 1: the bronze alloys 1-8 were immersed in the same test glass tank containing 2mol/L sodium hydroxide solution. The surface condition of bronze alloys 1-8 after immersion of 1d, 2d, 5d and 10d was observed and recorded separately and the results are shown in the following table:
and (4) analyzing results: from the experimental data, the lead-free bronze alloy provided by the invention has better alkali corrosion resistance effect, and achieves the expected purpose of the invention.
Comparative experiment 1: the bronze alloys 1-8 are all immersed in the same experimental glass tank, and the experimental glass tank is filled with a mixed solution of 1mol/L hydrochloric acid and 1mol/L phosphoric acid. The surface condition of bronze alloys 1-8 after immersion of 1d, 2d, 5d and 10d was observed and recorded separately and the results are shown in the following table:
and (4) analyzing results: from the experimental data, the lead-free bronze alloy provided by the invention has better acid corrosion resistance effect, and achieves the expected purpose of the invention.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A lead-free corrosion resistant bronze alloy characterized by: the bronze alloy comprises an alloy body and a corrosion-resistant coating coated on the surface of the alloy body, wherein the alloy body comprises main components of Cu, Sn, Ni and Bi and impurity components of Fe, P, Sb, Zr, Al and Zn, the total mass fraction of the impurity components in the alloy body is less than 1%, and the bronze alloy does not contain Pb.
2. The lead-free corrosion resistant bronze alloy according to claim 1, wherein: the total mass fraction of Cu in the alloy body is 70% or more.
3. The lead-free corrosion resistant bronze alloy according to claim 1, wherein: the alloy body comprises, by mass, 8% -12% of Sn, 1% -3% of Ni, 5% -8% of Bi, 0.01% -0.02% of Fe, 0.10% -0.25% of P, 0.05% -0.20% of Sb, 0.10% -0.30% of Zr, 0.01% -0.10% of Al, 0.02% -0.08% of Zn and the balance of Cu.
4. The lead-free corrosion resistant bronze alloy according to claim 3 wherein: the alloy body comprises 10 mass percent of Sn, 2 mass percent of Ni, 6.5 mass percent of Bi, 0.015 mass percent of Fe, 0.20 mass percent of P, 0.15 mass percent of Sb, 0.20 mass percent of Zr, 0.05 mass percent of Al, 0.05 mass percent of Zn and the balance of Cu.
5. The lead-free corrosion resistant bronze alloy according to claim 1, wherein: the corrosion-resistant coating comprises epoxy resin, acrylic resin, a corrosion-resistant auxiliary agent, inorganic filler and a toughening agent.
6. The lead-free corrosion resistant bronze alloy according to claim 5 wherein: the anti-corrosion aid includes diisocyanate, silica powder, and polymethyl methacrylate.
7. The lead-free corrosion resistant bronze alloy according to claim 6 wherein: the corrosion-resistant coating comprises, by mass, 30-40 parts of epoxy resin, 60-80 parts of acrylic resin, 5-15 parts of diisocyanate, 1-5 parts of silicon dioxide powder, 1-2 parts of polymethyl methacrylate, 10-40 parts of inorganic filler and 1-10 parts of toughening agent.
8. The lead-free corrosion resistant bronze alloy according to claim 7 wherein: the corrosion-resistant coating comprises, by mass, 35 parts of epoxy resin, 70 parts of acrylic resin, 10 parts of diisocyanate, 3 parts of silicon dioxide powder, 1.5 parts of polymethyl methacrylate, 25 parts of inorganic filler and 5 parts of toughening agent.
9. The lead-free corrosion resistant bronze alloy according to claim 5 wherein: the inorganic filler includes calcium carbonate powder.
10. The lead-free corrosion resistant bronze alloy according to claim 5 wherein: the toughening agent comprises carboxyl liquid nitrile rubber.
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